副词是一种用来修饰动词,形容词,全句的词,说明时间,地点,程度,方式等概念.
分 类:
1) 时间和频度副词:
now,then,often,always,usually,early,today,lately,next,last,already,generally,frequently,seldom,ever,never,yet,soon,too,immediately,hardly,finally,shortly,before,ago,sometimes,yesterday.
2) 地点副词:
here,there,everywhere,anywhere,in,out,inside,outside,above,below,down,back,forward,home,upstairs,downstairs,across,along,round ,around,near,off,past,up,away,on.
3) 方式副词:
carefully,properly,anxiously,suddenly,normally,fast,well,calmly,politely,proudly,softly,warmly
4) 程度副词:
much,little,very,rather,so,too,still,quite,perfectly,enough,extremely,entirely,almost,slightly.
5) 疑问副词:
how,when,where,why.
6) 关系副词:
when,where,why.
7) 连接副词:
how,when,where,why,whether.
而不 定式的全称是“动词不定式”,是一种非限定动词,由不定式符号to+动词原形构成.不定式具有动词的特征,同时也有名词、形容词和副词的特征.动词不定式是一种非限定性动词,由to＋动词原形构成,但它还是属于动词,所以它本身可以带宾语和状语.动词不定式在句中可以作主语、宾语、表语、定语和状语,还可用在复合结构中,而且有完成式、进行式、完成进行式和否定形式.动词不定式的被动形式除了一般形式外还有其完成式和进行式.
形式主语 就是不是真正的主语,但为了不让句子显得头重脚轻,就用形式主语,一般常用it,例如It is important that we should learn English.It作形式主语,we才是真正的主语.这也叫做强调句型,强调we