must have to 替换 necessary
问题描述:
must have to 替换 necessary
1.it will be necessary for you to see a doctor.
2.she said it would be necessary for us to stay here
3.it was necessary for him to go out last night
请问这三个句子如何改写?给个全的,第二个句子好像有多种改法.
第一个句子可以用must 吗?
答
可以,will be 即可以表示一般将来时中将要发生的动作,也可以表示决心和意愿