1.什么是让步状语从句?怎么用?2.虚拟语气是什么?怎么用?3.studentsmentalhealthhasbeenplayinganimportanrroleinourdailylives.词句的“playing”为什么用“ing”形式?4.specialistsinthisfieldaretoberequierd

Question

1.什么是让步状语从句?怎么用?
2.虚拟语气是什么?怎么用?
3.students mental health has been playing an importanr role in our daily lives.词句的“playing”为什么用“ing”形式?
4.specialists in this field are to be requierd to make full preparation for cases in time.词句的“make”为什么不用“making”形式?
5.if you have pains in mind,finding a friend to express them.
词句为什么用“finding”?为什么不是express to them"?
6.reading E-books has developed into part of our daily life,which is particularly appealing to young users.
此句 “appealing”为什么不用“appeals”?
daily life 可以用daily lives代替么?
7.long time of reading E-books will do more harm to your eyes.
此句中“reading”为什么用ing形式?
8.we will be rubbing shouders with aliens.
此句中“rubbing"为什么是ing形式?
9.besides supporting the family.men were also expected to climb the corporate ladder
此句中为什么“supporting”为什么是ing形式?
“climb”为什么不用“ing”形式?

Answer 1

你的语法不过关,建议买本关于语法的书看看吧.网上也应该有关于语法的教材的.
几个简单的语法:
to 后面的动词要用动词原形.
be 动词后面的动词要用动词+ing形式
一般情况,动词+ing会变成动名词