English

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1. When he comes back, I will go out with him.

2. If he comes back, I will go out with him.

(What is the difference between the two sentences?)

3. I don't know when he will come back.
4. Because he will come back, I will go back home.
5. If he comes back, I will go back home.
6. I don't know the time when he will come back.

(Are the sentences all correct?)

  • English -

    For the first two sentences --

    Using "when" assumes he is definitely coming back.
    Using "if" express doubt whether he'll be back or not.

    The others are correct.

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