Can you please check these sentences, too? Thank you. I just wonder if you could use these expressions in a common conversation.

1) I sent John three letters but he hasn't replied (not didn't reply)to any of them.
2) When did you get that jacket? I haven't noticed (not didn't notice) it before.
3) Would you mind if I opened the window? I'd rather leave it closed (but you left it closed)/Yes, I wouldn't./No, I wouldn't/No, not at all.
4) Is it all right if I leave it closed? No, it isn't./Yes, I don't mind. (?)
5)Do you mind if I open the window? Yes, I do/No, I don't./No, I don't mind/ I don't
6)Can I open the window? Yes, you can.No, you can't. No , not at all. (??)

1 answer

1) I sent John three letters, but he hasn't replied to any of them.

2) When did you get that jacket? I haven't noticed it before.

3) Would you mind if I opened the window? I'd rather leave it closed. /Yes, I wouldn't. /No, I wouldn't./ No, not at all.

4) Is it all right if I leave it closed? No, it isn't./ Yes, I don't mind.

5)Do you mind if I open the window? Yes, I do./ No, I don't./ No, I don't mind.

6)Can I open the window? Yes, you can. No, you can't.