after的用法
after有以后;后来等意思，那么你知道after的用法吗?下面跟着我一起来学习一下，希望对大家的学习有所帮助!
after的用法：
注意after和in的使用：从某时说到多少时间以后，不用after，而用in。如果指“某个时刻，日期或事件以后”，用after。
He will/would arrive in four weeks.
表达“某事件的若干时间以后”时，应是“若干时间after事件”，而不是“after若干时间of事件”。可说two hours after his arrival，不可说after two hours of his arrival。在“two hours after his arrival”前加不同的介词，有不同的意思:“two hours after his arrival”单用时指“他到达两小时以后”。若前面加the，如the two hours after his arrival指“他到达以后的两小时”，加for指“在他到达以后的两小时全段时间里”，加in 跟没有in意思相同，加within指“在他到达以后的两小时中的某时刻”;
指“若干时间after日期或月份”时，常把当天的日期或当月除外。如five days after 3 July，指从7月4日算起的5天以后，也就是7月9日。但有例外，five days after I July可能指7月8日，months after July可能指11月，注意避免这种结构产生误解;
指“从过去的某时或某事说到现在”时，不用after，用since，所以可说Since his graduation he has been abroad.(since不可改成after)一定要改的话，可表示为After his graduation he went abroad. 这里的after是介词，用作连接词时用法一样。
He went abroad after he graduated.
不可说 He has been abroad after he graduated.
half after four，five minutes after eight等是美国英语，相当于英国英语half past four，five minutes past eight等，英国方言中也有half after four等表达方式;
after引导的状语从句，用现在时态，不用将来时态。
I shall start after he comes.
after常指时间先后的次序，而behind常指位置，如August comes after July，用after,，而A garden lies behind the house，用behind。不过有时after和behind可以通用。
Please shut the door after/behind you.
He came in after/behind her.
be after指“追求，要求”，
He is after you.
他正在追求你。
He is always after me to teach him the violin.
他老是要我教他小提琴。
after all有时指“虽然这样”，
In coming home we got caught in the rain and became wet through and through, after all I don't mind as we had a fine time.
不可说be after doing …，这里不是指想要做什么，或是将要做什么，而是已经做了什么。但是可以用after doing…的结构。
After completing this form, give it to the secretary.
after作为副词时，通常不单用，而是以其他形式出现，如afterwards，then或afterthat。
I'm going to do my exams, and afterwards I'm going to study medicine.
after英语例句：
1. No matter where you go in life or how old you get, there's always something new to learn about. After all, life is full of surprises.
不管你生活在哪里，你有多少岁，总有新东西要学习，毕竟，生活总是充满惊喜。
2. He was fired from his job after roughing up a colleague.
他因为对一位同事动粗而被开除了。
3. The mystery hero imme-diately alerted police after spotting a bomb.
那个无名英雄发现炸弹后马上报了警。
4. After a three-weekend courtship, Pamela accepted Randolph's proposal of marriage.
经过3个周末的追求之后，帕梅拉接受了伦道夫的求婚。
5. The ballot was re-run on Mr Todd's insistence after accusations of malpractice.
因被控舞弊，在托德先生的坚持下重新进行了投票。
6. He does deserve some good luck after so much wretchedness.
经过这么多苦难之后，他应该行点好运了。
7. After sixteen years of marriage they have grown bored with each other.
结婚16年后，他们已经渐渐彼此厌倦了。
8. After years of neglect and decline the city was cleaning itself up.
多年的玩忽职守和经济萧条过后，这个城市在进行自我整顿。
9. After his elevation to the papacy, he reigned for two years.
他升任教皇后在位两年。
10. She dropped out after 20 kilometres with stomach trouble.
20公里后她因胃痛而退出了比赛。
11. They were spotted after three hours adrift in a dinghy.
他们在小舢板上漂浮了3个小时后才被发现。
12. These chaps know their stuff after seven years of war.
7年的战争过后，这些家伙都成了作战行家。
13. After the pain of defeat passes, England have some thinking to do.
失败的痛苦过去以后，英国人应该认真反思一下。
14. Hopefully, you won't have any problems after reading this.
希望你读完这个后就不会有任何问题了。
15. She travelled to India after taking her A levels.
她参加完高等程度考试后去印度旅行了。
