1.否定句：We can't do it like this.
一般疑问句：Can we do it like this?
划线提问：How can we do?
2.否定句：They don't do homework at home every day.
一般疑问句：Do they do homework at home every day?
划线提问1：What do they do at home every day?
2：Where do they do homework every day.