---问一个简单的问题---只要进来看看..
来源:百度知道 编辑:UC知道 时间:2024/06/15 23:52:42
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..
改为否定句..
是用 He doesn't回答..还是 He didn't回答..
为什么..
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 didn't
lifted 是lift的 过去式
lift这里是举的意思
变为He didn't lift it up.因为是过去的动作。
He didn't,因为用了lifted,改了之后要变回原形.
当然是didn't,因为lifted是过去式啊