they went to the mountian last weekend改为一般疑问句,否定句 对went to the mountian 提问.

问题描述:

they went to the mountian last weekend改为一般疑问句,否定句 对went to the mountian 提问.

一般疑问句:Did they go to the mountain last weekend?
否定句:They didn't go to the mountain last weekend.
提问:What did they do last weekend?