it was necessary for him to go out last night it is necessary for me to have some help she said it would be necessary for us to stay here
人气：410 ℃ 时间：2019-12-23 05:24:11
解答
it is necessary for me to have some help ----- 对我来说有必要去寻求一些帮助 是it is + 形容词 + to do 的用法 she said it would be necessary for us to stay here---- 她说我们有必要留在这里 是it is + 形容词 + to do 在宾语从句中的用法,从句的时态跟着主句走,主句过去时,从句过去将来时
