1You can go to the party with us if you
1You can go to the party with us if you 1、You can go to the party with us if you _____.1、You can go to the party with us if you _____. A want to B want to do C want it D want to go 为什么不用BD？ 2、You ought to have called him yesterday. Yes, I know I ______ A ought to B should have 为什么不用A？与第一题相比第一题省略了go这个动词，第二题没有省略have。到底什么时候省什么时候不省？
不定式省略句省去to后面的.如果不省的话必须是完整的句子,B中应为want to do it 而D中应为want to go to the party 才正确. 第二句是虚拟语气的固定用法,当表示"过去应该做的而没做"的时候 必须用should/ought to have done… 的结构,而have就是"过去"这个虚拟语气的体现. 另外你想下一般完成时的句子中have能省吗? 其实说白了就是固定用法,要想学英语,你就必须得记住!
答：right here waiting yesterday once more sailing详情>>
