现在完成时和一般过去时的句型及用法,

现在完成时 表示动作发生在过去,完成在过去,但强调与现在情况仍有联系,其结果或影响仍存在.现在完成时有一些标志性的时间状语：考点一：for + 时间段；since + 时间点 They have lived in Beijing for five years.They have lived in Beijing since 1995.I have learned English for ten years.考点二：常见的不确定的时间状语：lately; recently,just,already,yet,up to now; till now; so far,these days,Has it stopped raining yet 考点三：在表示“最近几世纪/ 年/ 月以来……”时间状语中,谓语动词用现在完成时.in the past few years/months/weeks/days；over the past few years; during the last three months; for the last few centuries,through centuries; throughout history 等 考点四：表示“第几次做某事,”或在 “It is the best (worst,most interesting ) +名词 ＋that” 后面跟现在完成时.This is my first time that I have visited China.This is the most interesting film I have ever seen.That is the only book that he has written.4．一般过去时 表在过去某个特定时间发生且完成的动作,或过去习惯性动作,不强调对现在的影响,只说明过去.常跟明确的过去时间连用,如：yesterday; last week; in 1945,at that time; once; during the war; before; a few days ago; when,注意：考点一：used to + do,表示过去经常但现在已不再维持的习惯动作.to为不定式,后接动词原形.be/become/get used to + doing,表示习惯于 He used to smoke a lot.He has got used to getting up early.考点二：在时间和条件状语从句中,代替过去将来时.He promised to buy me a computer if he got a raise

现在完成时和一般过去时所表示的动作都发生在过去，但它们所强调的重点不同：现在完成时侧重于对现在的影响；而一般过去时侧重于某一动作发生在过去某个时间或某段时间，即现在完成时侧重于现在的结果，而一般过去时侧重于动作发生的时间。例如： I have seen the film. 我看过这部电影。（现在我仍记得电影的内容） I saw the film three days ago. 三天前我看了这部电影...