Ответ:

1. I haven't done aerobics before, but I have tried something similar.
2. Has Dereck directed film before?
3. Janet and Olivia haven't finished their art corves yet.
4. Evan has planted an apple tree, but it hasn't produced any apples.
5. Have you brought your umbrella with you?
6. Professor Smith has made a new robot but I don't know what it does.

Объяснение:

Ответ:

Объяснение:

I haven't done aerobics before, but I have tried something similar.

Has Dereck directed film before?

Janet and Olivia haven't finished their art corves yet.

Evan has planted an apple tree, but it hasn't produced any apples.

Have you brought your umbrella with you?

Professor Smith has made a new robot but I don't know what it does.