both and 的用法
Both you and I are students. both...and...“两者都...”,连接名词或代词作主语时,谓语动词用复数形式,不受‘就近原则’的限制。如,
Both Li Ming and Wei Hua are good at English.
2.and 连接两个成分作主语时,谓语要用复数形式。如,You and she are on duty today.
3.采用就近原则的情况:当连词或连词短语连接两个成分,而重点强调的是“其中之一”的时候,要采用就近原则。
如,or, either...or..., neither...nor..., not only...but also...等连接主语时,谓语动词以后面的那个主语为主。
如,You or he is right.
Either your teacher or your classmates were there
both,all的区别和用法
all , both, 表示“都”,“全部”。
(1) both指两个人或物,而all指三个以上的人或物,在句中都可作主语、宾语、表语、同位语或定语。
Both of us want to go. 我们两人都想去。
All of us should work hard.我们都应努力工作。
(2) both和all都可直接修饰名词;名词前如有限定词时,其前只能用both of或all of。
Both brothers are clever. 兄弟俩都聪明。
Both of the books are useful.两本书都有用。
(3) both和all在句中的位置是位于be动词之后,行为动词之前,如有情态动词或助动词,则位于情态动词或助动词与主动词之间。
We are all here. 我们都来了。
[特别提醒]
(1) both的反义词是neither, all的反义词是none。
Both of us are not doctors. 我们俩并非都是医生。 (部分否定)
Neither of us is a doctor. 我们俩都不是医生。(全部否定)
All of the books are not helpful. 并非所有这些书都对人有帮助。(部分否定)