The door doesn‘t lock.
The door can‘t open.
This pen writes very well.
13.除助动词be可以构成被动语态外,get, become等词也可以+过去分词构成被动意义。
She was unhappy because she didn‘t get invited to the party.
(。)主谓一致。
主谓一致指的是句子的谓语动词与其主语在数上必须保持一致,句子的主语是第三人称单数,其谓语动词须用单数,主语是复数,则谓语动词用复数。
1.主谓一致的三个原则。
英语中的主谓一致主要遵循三个原则:意义一致原则、语法一致原则和就近原则。这三个原则常常发生矛盾,但当发生冲突时,意义一致原则为优先考虑的原则。
(1)语法一致原则:
主语和谓语通常是在语法形式上取得一致,即主语是单数形式,谓语动词也应采取单数形式;主语是复数形式,谓语动词也应采取复数形式。
She is a girl.她是女孩。
They are all girls.她们都是女孩。
The professor and writer is invited to many universities to deliver lectures.
这位教授兼作家被邀请到很多大学作报告。
(教授与作家是同一个人,是单数.)
The old are very well taken care of in our city.老年人在我们城市被照顾得很好。( the old指所有的老年人,指一类人,为复数概念。)
(2)就近原则:
谓语动词的人称和数由靠近它的主语决定。
There is a book,two pens and three pencils on the desk.
书桌上有一本书,两支钢笔和三支铅笔。
There are two pens,a book and three pencils on the desk.
书桌上有两支钢笔,一本书和三支铅笔。
Either my sisters or my mother is coming.
不是我的姐妹们就是我的妈妈要来。