2．They have found the lost books already．（改为一般疑问句,并作否定回答） ______ they _______ the
问题描述：
2．They have found the lost books already．（改为一般疑问句,并作否定回答） ______ they _______ the
2．They have found the lost books already．（改为一般疑问句，并作否定回答）
______ they _______ the lost books _______？No，they________．
答
Have they found the lost books yet?No,they haven't.
在现在完成时中,有肯定句变成否定或者疑问时,already 要转变成yet
have在这里做助动词用了,而不是实义动词,根据：用什么提问用什么回答,所以要用have回答