语法一直是学英语的难题，但打好语法基础对提升成绩至关要紧！新东方在线我们为大伙整理了2024年12月英语四级语法常识：比较过去时与目前完成时，期望能为各位考生提供参考和帮助。
2024年12月英语四级语法常识：比较过去时与目前完成时
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;目前完成时为过去发生的，强调过去的事情对目前的影响，强调的是影响。
2)过去时常与具体的时间状语连用，而目前完成时一般与模糊的时间状语连用，或无时间状语。
一般过去时的时间状语:
yesterday, last week，…ago, in1980, in October, just now, 具体的时间状语
一同的时间状语:
this morning, tonight,this April, now, once，before, already, recently，lately
目前完成时的时间状语
for, since, so far, ever, never, just, yet,till / until, up to now, in past years, always,
不确定的时间状语
3)目前完成时可表示持续到目前的动作或状况，动词一般是延续性的，如live, teach, learn, work, study, know.
过去时常见的非持续性动词有come, go, leave, start, die, finish, become, get married等。
举例：
I saw this film yesterday.
I have seen this film.
Why did you get up so early?
Who hasnt handed in his paper?
She has returned from Paris.
她已从巴黎回来了。
She returned yesterday.
她是昨天回来了。
He has been in the League for three years.
He has been a League member for three years.
He joined the League three years ago.
I have finished my homework now.
---Will somebody go and get Dr. White?
---Hes already been sent for.
句子中如有过去时的时间副词时，不可以用目前完成时，要用过去时。
Tom has written a letter to his parents last night.
Tom wrote a letter to his parents last night.
以上就是新东方在线我们为大伙收拾的“2024年12月英语四级语法常识：比较过去时与目前完成时”的全部内容啦，预祝各位小伙伴顺利通过四级考试!