Question

他们通常在下午跳水.肯定句 否定句 疑问句 答句（yes、no） 特问句 英语的.

Answer 1

肯定句：They usually go diving in the afternoon.

否定句：They usually don`t go diving in the afternoon.

简单疑问句：Do they usually go diving in the afternoon?Yes,they do./No,they don`t.

特殊疑问句：Why do they usually go diving in the afternoon?/When do they go diving usually?/What do they usually do in the afternoon?

最后这个特殊疑问句要视你打算问句子的那一部分而定啊!