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

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

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

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

Dairy products keep longer if you (put) them into the fridge.

She would not have stolen the food if her child (not/be) hungry.

If you (leave) ice in the sun, it (melt).

If Jack had planned it carefully, he (not/have) so many problems.

He is a very wise person. I (speak) to him if I were you. ​

1. If she weren't so lazy, she would become a brilliant student.
Explanation: The sentence is using the second conditional tense, which is used to talk about unreal or hypothetical situations in the present or future. In the if-clause, we use the simple past tense "weren't" because it is not true that she is lazy. In the result clause, we use the conditional form "would become" to indicate the hypothetical outcome if she were not lazy.

2. I am not sure what I am doing tonight, but if I go out, I will phone you.
Explanation: The sentence is using the first conditional tense, which is used to talk about real or possible future actions or events. In the if-clause, we use the present simple tense "go" because it is a possible action in the future. In the result clause, we use the future form "will phone" to indicate the action that will happen if the condition is fulfilled.

3. If Steve hadn't bought a lottery ticket, he would not have won $1 million.
Explanation: The sentence is using the third conditional tense, which is used to talk about unreal or hypothetical past situations. In the if-clause, we use the past perfect tense "hadn't bought" because it is not true that he didn't buy a ticket. In the result clause, we use the conditional perfect form "would not have won" to indicate the hypothetical outcome if Steve hadn't bought the ticket.

4. Dairy products keep longer if you put them into the fridge.
Explanation: The sentence is using the present simple tense, which is used to talk about general facts or habits. In this case, it is a general fact that dairy products keep longer if they are put into the fridge. The verb "put" is in the present simple tense to indicate a habitual action.

5. She would not have stolen the food if her child weren't hungry.
Explanation: The sentence is using the second conditional tense. In the if-clause, we use the simple past tense "weren't" because it is not true that her child is hungry. In the result clause, we use the conditional perfect form "would not have stolen" to indicate the hypothetical outcome if her child weren't hungry.

6. If you leave ice in the sun, it will melt.
Explanation: The sentence is using the first conditional tense. In the if-clause, we use the present simple tense "leave" because it is a possible action in the future. In the result clause, we use the future form "will melt" to indicate the action that will happen if the condition is fulfilled.

7. If Jack had planned it carefully, he would not have had so many problems.
Explanation: The sentence is using the third conditional tense. In the if-clause, we use the past perfect tense "had planned" because it is not true that Jack had planned it carefully. In the result clause, we use the conditional perfect form "would not have had" to indicate the hypothetical outcome if Jack had planned it carefully.

8. He is a very wise person. I would speak to him if I were you.
Explanation: The sentence is using the second conditional tense. In the if-clause, we use the past simple tense "were" instead of "am" because it is a hypothetical or unreal situation. In the result clause, we use the conditional form "would speak" to indicate the action that would happen if the condition is fulfilled. The phrase "if I were you" is a common expression used to give advice or make a suggestion.