Mấy câu này không chắc lắm ạ.

1.He must not have retired.

2.He must have done a lot of gardening.

3.He must have been working in his garden now.

4.They must have been making a film.

*WRITE THESE SENTENCES AGAIN:

1. I'm sure he hasn't retired yet. He still leaves the house every morning

=> He must has retired.

2. I'm sure he does a lot of gardening. He is certainly an expert

=> He must has done a lot of gardening.

3. I'm sure he is working in his garden now. I can hear someone is digging.

=> He must has been working in his garden now.

4. Look at those lights and cameras. Ah! Now I understand. They are making a film

=> They must has been making a film.

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@Binz

#NOCOPY