初中英语语法之时态及练习
be(“是/存在”)动词的各种时态变化:
一般现在时一般将来时一般过去时一般过去时
I am….
You are.…
He/She/It is…. We/You/They are (I/She/He /It) will be….
I am
He/She/It is going to be
We/You/They are
I was….
You were.…
He/She/It was….
We/You/They were
I was….
You were.…
He/She/It was….
We/You/They were
注意:句型变化时,
否定句在am /is /are /will /was /were / 后面加not,而且not都可以缩写为n’t (am后面not不可以缩写);
疑问句将am /is /are /will /was /were 提前到句首。
其它谓语动词(主动语态)的时态变化一览表:
时态一般现在时现在进行时一般将来时
一般过去
时
谓语动词构成动词用原形(单三
加s / es)
(问句和否定句借
用助词do / does)
am
is +动词-ing
are
will + 动词原形
am
is +going to+动词原形
are
动词用过去式
(问句和否定句
借用助词did)
时态的具体用法:
(1)一般现在时表示现阶段经常或习惯发生的动作或存在的状态,或说明主语的特征。
①一般现在时句子中常有的时间状语:often,usually,sometimes,always,every(day等), once/twice,a (week等), on (Sunday等),never,in the (morning等)。如:They go to the Palace Museum once a year.(他们每年去一次故宫)/ They often discuss business in the evening.(他们经常在晚上商谈生意)
②表示客观真理、事实、人的技能或现在的状态时句子里一般不用时间状语。如:The earth turns round the sun.(地球绕着太阳转)/ Light travels faster than sound.(光传播比声音快)
③表示十分确定会发生(如安排好的事情)或按照时间表进行的事情,用一般现在可以表达将


