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ʮһʱһȥʱһ㽫ʱȥʱڽʱȥʱȥʱʱȥʱʱȥʱɽʱȥɽʱɽʱȥɽʱ

һʱ simple present tense һȥʱ simple past tense ʱpresent perfect tense ȥʱ past perfect tense һ㽫ʱsimple future tense ڽʱ present continuous tense --

һwhenԺԶ,ҲԺͶԶãwhileasֻܺԶ. Why do you want a new job when youve got such a good one already?getΪԶʣѾҵ˺õĹ,Ϊλµ? Sorry,I was o...

just nowղšһ֮ǰʱһȥʱãλھ׻ĩҲָģڡƬ֮󡱣ʱʱʱ磺 They gave it to me just nowǸղŰҡ I'm busy just nowںæ ...

úܺãڽһЩ֮ǰΪʲô̽ʵ㣬ҲΪʲôûʱ̬ Ҫϸо²ܹ˵ģ²Ը¥̽⡣ ȣΪӢ...

Ӣеġʱ̬Ծеνﶯ˵ġ ʱ̬壺˼壬ʾǸ鷢ġʱ䡱ȥڷ͡״̬ŵģ˵ģһ״̬ȣ ʱ̬Ĵʽ ͨνﶯʵIJͬʽ...

have been done ʱеıṹ 䱻̬ṹ ϶ʽΪhave/ has +been +done ʽΪhave/ has +not +been +done ʱǡȥĶ״̬ڲѾɡӢʱ̬Уʱָʱ䣬...

is һʱ̬ ԭbe beĹȥʽwas were beĽʽ will be beʽ has/have been beĹȥʽhad been

1. һʱ He cleans the blackboard. 2һȥʱ He cleaned the blackboard. 3һ㽫ʱ He will clean the blackboard. 4ڽʱ He is cleaning the blackboard. 5ȥʱ He was cleaning the blackboard. 6...

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