作业帮英语过去时与完成时的区别
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英语过去时与完成时的区别
英语过去时与完成时的区别
英语过去时与完成时的区别
过去式只和过去有关
现在完成时,是连接过去和现在的时态,过去发生的事和现在有关联
过去时，即did,指过去做过的事情，远远在"现在"这个时间点之前
完成时，即have done或 had done
前者是指刚刚在“现在”之前完成的事情，可能在持续发生着的事情
后者是指 在过去已经完成的事情，不可能持续发生的。
1）过去时表示过去某时发生的动作或单纯叙述过去的事情，强调动作；现在完成时为过去发生的，强调过去的事情对现在的影响，强调的是影响。 2）过去时常与具体
PAST TENSE = 过去时
It refers to
a. action which happened at a specific time in the past - She walked to work yesterday
b. completed action - Grace finished her homework on time.
c. past ...
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PAST TENSE = 过去时
It refers to
a. action which happened at a specific time in the past - She walked to work yesterday
b. completed action - Grace finished her homework on time.
c. past status - She was born in 1992.
Perfect Tenses (完成时) require the verb - past participle.
present = go/talk
past = went/talked
"past participle = have/has gone have/has talked"
present participle = is/am/are going is/am/are talking
PRESENT PERFECT TENSE - 现在完成时
The present perfect tense shows an action in the recent past,
eg. I have just eaten my lunch.
Subject + have + Past Participle.
PAST PERFECT TENSE - 过去完成时
The past perfect tense shows an action in the past
eg. I had eaten bread for breakfast yesterday.
Subject + Had + Past Participle.
FUTURE PERFECT TENSE - 将来完成时
The future perfect tense shows an action in the future, It is predicted that the action is completed by that time.
eg. i will have eaten my cake by the time you come back.
Subject + Will/Shall + Have + Past Participle.
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