英语四种时态总结定义时间状语肯定句一般疑问句否定句形式1、一般现在时常常、反复发生的动作或行为及现在的某种状况
often, usually , always, sometimes, everyday(week, month),once a week,on Mondays, etc
be 动词I am a boy
行为动词I/We/You/They read a book every day
He/She/It reads a book every day
Are you a boy
Do I/you/we/they read a book every day
Does he/she/it read a book every day
I am not a boy
I/You/We/They don’t read a book every day
He/She/It doesn’t read a book every day
2、现在进行时表示现阶段或说话时正在进行的动作或状态
now, at this time, these days, etc
I am reading a book now
Are you reading a book now
I am not reading a book now
3、一般过去时过去某个时间里发生的动作或状态; 过去习惯性、常常性的动作、行为
ago , yesterday, last week(month, year… ) , in 2000, just now, one day , long long ago, etc
I saw a UFO last night
Did you see a UFO last night
I didn’t see a UFO last night
4、一般将来时表示将要