1.I'm going to buy a gift for my friend.
否定句:I'm not going to buy a gift for my friend.
疑问句:Are you going to buy a gift for your friend.
2.It will rain tomorrow.
否定句:It won't rain tomorrow
疑问句:Will it rain tomorrow?
3.His father often drive to work last year.
否定句:His father doesn't often drive to work last year
疑问句:Does his father often drive to work last year?
4.We won in the gym just now.
否定句:We didn't won in the gym just now.
疑问句:Did we win in the gym just now?
5.He has many books.
否定句:He doesn't have many books.
疑问句:Does he has many books?
6.She loves English very much.
否定句:She doesn't love English very much.
疑问句:Does she love English very much?
7.I'm going home now.
否定句:I'm not going home now.
疑问句:Are you going home now?
8.They can come down from that tree.
否定句:They can't come down from that tree.
疑问句:Can they come down from that tree?.
9.Some girls are singing in the classroom.
否定句:Some girls aren't singing in the classroom.
疑问句:Are some girls singing in the classroom?
10.My brother is going to Shanghai next week.
否定句:My brother isn't going to Shanghai next week.
疑问句:Is your brother going to Shanghai next week?
你句子中出现的错误也帮你改正过来了
希望能够帮到你!