一般现在时
do(主动)/be done(be 加过去分词)
如:i watch a game
a game is watched by me
当句子里没有出现特殊提示词时用一般现在时
事实 名言 真理
陈述时刻表时(9:00 7:00 7:30 seven o'clock)时刻表(如火车出发表)
句子中出现每天,每年或者经常重复的动作 用一般现在时 (often usually always everyday every year)
主将从现:时间状语从句 条件状语从句中主句用将来时 从句用一般现在时
I will appreciate you,when you help me.
现在进行时
be doing/be being done
如 i am watching a game
the game is being watched by me
强调某一个时刻: when you arrive(得是瞬间动词),i am reading.
出现提示词 now
与always连用表示总是,老是 be always doing
情景对话 描述打电话的回复句
现在完成时
(主动)have done/(被动)have been done
i have watched a game
a game have been watched by me
强调事情已经发送过了或者已完成并且对目前造成了影响(过去对现在造成了影响)
完成时动词往往是延续性动词
提示词:
1. for + 时间段 for five days
2. since + 时间点(无论时间点是过去还是将来 主句都是现在完成时) since you arrive
3. by + the time (时间状语从句特殊引导词)
如: by the time you arrive,i will have picked you up.
(1)+ 现在时间表现在完成时 by now
(2)+ 过去时间表过去完成时 by the yesterday
(3)+ 将来时间表将来完成时 by the next month
4. so far 到目前为止(永恒不变的现在完成时)
5. up to now到目前为止
6. yet 目前为止
7. many /three /four +time(次数)表示多次(一次不行)
8. it is +time +that
9. this is +time + that
现在完成进行时
have/has been doing
如:i have been looking for my book
动作从过去一直持续到现在