在英语中,现在完成时的标志词被用来表明动作或状态在过去某一时刻开始,并持续到现在,或者可能还会继续下去。以下是几种常见的现在完成时标志词:
Already:表示动作已经完成,常常用于肯定句中,如 "I have already finished my homework."
Yet:通常用于否定句或疑问句中,表示某个动作尚未发生,如 "Have you packed your suitcase yet?"
Just:强调刚刚完成的动作,如 "I've just had breakfast."
Before, Recently, Still, Lately:这些词表明动作是在最近的时间段内发生的,如 "I've seen the movie before."
Never, Ever:表示从未发生过,如 "I've never been to Europe."
Twice, On several occasions, In the past few days/weeks/months/years:强调过去的多次重复,如 "She's visited Paris twice."
This morning/week/month/year:指从现在往前数的具体时间,如 "I've been studying this morning."
Up to, So far, Up to now, Till now:这些词强调截止到现在,如 "She's read the book up to chapter 5."
Since + 点时间(如 "since yesterday")或段时间(如 "since last month"):表示从某个时间点开始,直到现在,如 "I've been working here since April."
It is + 时段 + since + 从句(过去时):如 "It is three years since I graduated."
掌握这些标志词能帮助你更准确地使用现在完成时表达已经发生或持续的状态。
扩展资料现在完成时(Present perfect)过去发生并且已经完成的动作对现在造成影响或后果,过去某一时间开始并一直持续到现在并且有可能还会持续的动作或状态。