3. Conditional sentences. Complete the sentences. Use the correct form of the verbs in brackets.

1. If she weren’t so lazy,she ( become) a brilliant student.

2. I am not sure what I am doing tonight, but If I go out, I (phone) you.

3. If Steve hadn’t bought a lottery ticket, he (not /win) $1 million.

4. We usually (walk) home together if we both (finish) at the same time.

5. If the police question you, (tell)them the truth.

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1. If she weren't so lazy, she would become a brilliant student.
To complete this sentence, we use the second conditional form of the verb "to be" (were/weren't) followed by the base form of the verb "become". The second conditional is used to talk about hypothetical or unreal situations in the present or future.

2. I am not sure what I am doing tonight, but if I go out, I will phone you.
To complete this sentence, we use the first conditional form of the verb "to go" (go) followed by the base form of the verb "phone". The first conditional is used to talk about possible or likely situations in the future.

3. If Steve hadn't bought a lottery ticket, he wouldn't have won $1 million.
To complete this sentence, we use the third conditional form of the verb "to have" (hadn't) followed by the base form of the verb "win". The third conditional is used to talk about unreal or hypothetical situations in the past.

4. We usually walk home together if we both finish at the same time.
To complete this sentence, we use the present simple form of the verb "walk" followed by the base form of the verb "finish". This sentence is in the present simple tense because it is a general statement about a habitual action.

5. If the police question you, tell them the truth.
To complete this sentence, we use the present simple form of the verb "tell" after the word "if". This sentence is in the present simple tense because we are talking about what should be done in a general situation.

I hope this explanation helps you understand conditional sentences better! If you have any more questions, feel free to ask.