---问一个简单的问题---只要进来看看..
He lifted it up.
改为否定句..
是用 He doesn't回答..还是 He didn't回答..
为什么..
参考答案:用didn't呀
因为你看你用了lifted,这是过去时,所以do也要变成过去时did
He lifted it up.
改为否定句..
是用 He doesn't回答..还是 He didn't回答..
为什么..
参考答案:用didn't呀
因为你看你用了lifted,这是过去时,所以do也要变成过去时did