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英语系动词后面可以跟介词么?

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/11/06 07:21:26
英语系动词后面可以跟介词么?
如题
当句子中有情态动词,系动词用be.如:must,can,need,should等作主语后都用be.
当句子中只有名词时,可用is,are.如果该名词是可数名词,那么当它是复数形式则用are.如果该名词是单数形式或不可数名词,则用is.
当然,are,is是用于一般现在时和一般将来时,而be可用于一般现在时,一般将来时,过去时,完成时等时态.(在完成时态中,be可不加情态动词)
系动词称 联系动词(Link Verb),作为系动词,它本身有词义,但不能单独用作谓语,后边必须跟表语(亦称补语),构成系表结构说明主语的状况、性质、特征等情况.
说明:
有些系动词又是实义动词,该动词表达实义时,有词义,可单独作谓语,例如:
He fell ill yesterday.
他昨天病了.(fell是系动词,后跟补足语,说明主语情况.)
He fell off the ladder.
他从梯子上摔下来.fell是实义动词,单独作谓语.
1)状态系动词
用来表示主语状态,只有be一词,例如:
He is a teacher.他是一名教师.(is与补足语一起说明主语的身份.)
2)持续系动词
用来表示主语继续或保持一种状况或态度,主要有keep,rest,remain,stay,lie,stand,例如:
He always kept silent at meeting.他开会时总保持沉默.
This matter rests a mystery.此事仍是一个谜.
3)表像系动词
用来表示"看起来像"这一概念,主要有seem,appear,look,例如:
He looks tired.他看起来很累.
He seems (to be) very sad.他看起来很伤心.
4)感官系动词
感官系动词主要有feel,smell,sound,taste,例如:
This kind of cloth feels very soft.
这种布手感很软.
This flower smells very sweet.
这朵花闻起来很香.
5)变化系动词
这些系动词表示主语变成什么样,变化系动词主要有become,grow,turn,fall,get,go,come,run.
例如:
He became mad after that.自那之后,他疯了.
She grew rich within a short time.她没多长时间就富了.
6)终止系动词
表示主语已终止动作,主要有prove,trun out,表达"证实","变成"之意,例如:
The rumor proved false.这谣言证实有假.
The search proved difficult.搜查证实很难.
His plan turned out a success.他的计划终于成功了.(turn out表终止性结果)
系动词be的用法
1) be 现在分词,构成进行时态,例如:
They are having a meeting.他们正在开会.
English is becoming more and more important.英语现在越来越重要.字串1
2) be 过去分词,构成被动语态,例如:
The window was broken by Tom..窗户是汤姆打碎的.
English is taught throughout the world.世界各地都教英语.字串6
3) be 动词不定式,可表示下列内容:
a.表示最近、未来的计划或安排,例如:
He is to go to New York next week..他下周要去纽约.
We are to teach the freshpersons.我们要教新生.
说明:这种用法也可以说成是一种将来时态表达法.
b.表示命令,例如:
You are to explain this.对此你要做出解释.
He is to come to the office this afternoon.要他今天下午来办公室.
c.征求意见,例如:
How am I to answer him?我该怎样答复他?
Who is to go there?谁该去那儿呢?
d.表示相约、商定,例如:
We are to meet at the school gate at seven tomorrow morning.我们明天早晨7点在校门口集合.
一个口诀,我是am,你是are,is用于他她它,凡是复数都用are