If Ali doesn't study, he _______ the test.

This sentence is in the first conditional form, which is used to talk about real possibilities in the future. The structure is 'if + present simple, will + base verb'.

If I see him tomorrow, I _______ him your message.

This is also a first conditional sentence. The correct structure is 'if + present simple, will + base verb'.

If the sun sets, it _______ dark.

This is a zero conditional sentence, which is used for general truths. The structure is 'if + present simple, present simple'.

If she calls, please _______ her I’m busy.

This is a first conditional sentence. The correct structure is 'if + present simple, imperative form'.

If it snowed, we _______ build a snowman.

This is a second conditional sentence, used for hypothetical situations. The structure is 'if + past simple, would + base verb'.

If I _______ a passport, I could travel abroad.

This is a second conditional sentence. The structure is 'if + past simple, could + base verb'.

If you eat too much sugar, you _______ weight.

This is a first conditional sentence. The structure is 'if + present simple, will + base verb'.

If the train is late, we _______ a taxi.

This is a first conditional sentence. The structure is 'if + present simple, will + base verb'.

If she were taller, she _______ join the basketball team.

This is a second conditional sentence. The structure is 'if + past simple, could + base verb'.

If we win this match, we _______ the trophy.

This is a first conditional sentence. The structure is 'if + present simple, will + base verb'.

If you dropped it, it _______ break.

This is a second conditional sentence. The structure is 'if + past simple, would + base verb'.

If I _______ late, don’t wait for me.

This is a first conditional sentence. The structure is 'if + present simple, imperative form'.

If you drank poison, you _______ sick.

This is a second conditional sentence. The structure is 'if + past simple, would + base verb'.

If they finish early, they _______ us.

This is a first conditional sentence. The structure is 'if + present simple, will + base verb'.

If I had a laptop, I _______ my work from home.

This is a second conditional sentence. The structure is 'if + past simple, could + base verb'.

If he had told me, I _______ him.

This is a third conditional sentence, used for hypothetical situations in the past. The structure is 'if + past perfect, would have + past participle'.

If the doctor had arrived in time, she _______ survived.

This is a third conditional sentence. The structure is 'if + past perfect, might have + past participle'.

If I _______ been more careful, I wouldn't have broken it.

This is a third conditional sentence. The structure is 'if + past perfect, would not have + past participle'.

If you had locked the door, the thief _______ entered.

This is a third conditional sentence. The structure is 'if + past perfect, wouldn't have + past participle'.

If I had seen the sign, I _______ stopped.

This is a third conditional sentence. The structure is 'if + past perfect, would have + past participle'.

If she hadn't missed the bus, she _______ on time.

This is a third conditional sentence. The structure is 'if + past perfect, would have been + present participle'.

If you hadn’t lied, they _______ you.

This is a third conditional sentence. The structure is 'if + past perfect, would have + past participle'.

If we _______ earlier, we could have avoided the traffic.

This is a third conditional sentence. The structure is 'if + past perfect, could have + past participle'.

If I were fluent in French, I _______ in Paris.

This is a second conditional sentence. The structure is 'if + past simple, could + base verb'.

If I were not busy, I _______ with you.

This is a second conditional sentence. The structure is 'if + past simple, would + base verb'.

If you had watered the plants, they _______ not die.

This is a third conditional sentence. The structure is 'if + past perfect, would have + past participle'.

If I had known, I _______ done things differently.

This is a third conditional sentence. The structure is 'if + past perfect, would have + past participle'.

If she had studied, she _______ failed the exam.

This is a third conditional sentence. The structure is 'if + past perfect, wouldn't have + past participle'.

If I had your number, I _______ you.

This is a second conditional sentence. The structure is 'if + past simple, would + base verb'.

If the power goes out, we _______ candles.

This is a first conditional sentence. The structure is 'if + present simple, will + base verb'.

If he hadn’t eaten so much, he _______ sick.

This is a third conditional sentence. The structure is 'if + past perfect, wouldn't have + past participle'.

If it rains, we _______ inside.

This is a first conditional sentence. The first conditional is used to talk about real and possible situations in the future. The structure is: If + present simple, will + base verb.

If I were you, I _______ do that.

This is a second conditional sentence. The second conditional is used to talk about unreal or unlikely situations in the present or future. The structure is: If + past simple, would + base verb.

If she _______ hard, she will pass the exam.

This is a first conditional sentence. The first conditional is used to talk about real and possible situations in the future. The structure is: If + present simple, will + base verb.

If you _______ earlier, you would have seen him.

This is a third conditional sentence. The third conditional is used to talk about unreal situations in the past. The structure is: If + past perfect, would have + past participle.

If we _______ time, we will visit the museum.

This is a first conditional sentence. The first conditional is used to talk about real and possible situations in the future. The structure is: If + present simple, will + base verb.

If she had asked, I _______ helped her.

This is a third conditional sentence. The third conditional is used to talk about unreal situations in the past. The structure is: If + past perfect, would have + past participle.

If you heat water, it _______.

This is a zero conditional sentence. The zero conditional is used to talk about general truths or scientific facts. The structure is: If + present simple, present simple.

If they _______ the truth, they would tell us.

This is a second conditional sentence. The second conditional is used to talk about unreal or unlikely situations in the present or future. The structure is: If + past simple, would + base verb.

If we _______ the tickets, we can go to the concert.

This is a first conditional sentence. The first conditional is used to talk about real and possible situations in the future. The structure is: If + present simple, will/can + base verb.

If she _______ a car, she would travel more.

This is a second conditional sentence. The second conditional is used to talk about unreal or unlikely situations in the present or future. The structure is: If + past simple, would + base verb.

If they _______ to the meeting, they would have learned the news.

This is a third conditional sentence. The third conditional is used to talk about unreal situations in the past. The structure is: If + past perfect, would have + past participle.

If I _______ a millionaire, I would help the poor.

This is a second conditional sentence. The second conditional is used to talk about unreal or unlikely situations in the present or future. The structure is: If + past simple, would + base verb.

If you _______ your homework, you will succeed.

This is a first conditional sentence. The first conditional is used to talk about real and possible situations in the future. The structure is: If + present simple, will + base verb.

If you _______ careful, you would avoid mistakes.

This is a second conditional sentence. The second conditional is used to talk about unreal or unlikely situations in the present or future. The structure is: If + past simple, would + base verb.

If she _______ here, she will help us.

This is a first conditional sentence. The first conditional is used to talk about real and possible situations in the future. The structure is: If + present simple, will + base verb.

If we _______ enough money, we will buy a house.

This is a first conditional sentence. The first conditional is used to talk about real and possible situations in the future. The structure is: If + present simple, will + base verb.

If I _______ him, I would apologize.

This is a second conditional sentence. The second conditional is used to talk about unreal or unlikely situations in the present or future. The structure is: If + past simple, would + base verb.

If we _______ here, we will be on time.

This is a first conditional sentence. The first conditional is used to talk about real and possible situations in the future. The structure is: If + present simple, will + base verb.

If they _______ more, they would save money.

This is a second conditional sentence. The second conditional is used to talk about unreal or unlikely situations in the present or future. The structure is: If + past simple, would + base verb.

If I _______ a dog, I would take it for a walk.

This is a second conditional sentence. The second conditional is used to talk about unreal or unlikely situations in the present or future. The structure is: If + past simple, would + base verb.