无忧商务网
2022-04-01
450
10
|
英语复习知识点概要Busy和but for Busy be busy doing sth. 该结构意为“忙于做某事”。应注意的是be busy 后只能接动词-ing形式，不能接动词不定式to do,相同结构的形容词还有worth。如： ①He is busy writing his composition. ②She keeps busy working on a new novel these weeks. ③This book is well worth seeing. but prep. 除…之外。与except同义，除了的部分与其他部分不在一个范围内，不具有一致性。except适用场合较多，but 主要用于带有nothing/nobody/no one/all 等不定代词的句子。 ①No one except/but you was late.除你之外没有迟到。（你迟到了） ②We all went to see a film yesterday evening except/but you.除你之外作天晚上我们都去看电影了。（你没去） ③That window is open except in winter .除冬天外那窗户一直开着。（冬天不开）另外，but后可接不不定式。如果句子前面有实义动词do及其变化形式时，不定式不带to; 否则不定式带to . ①I did nothing yesterday evening but watch TV.昨天晚上除看电视外我什么也没干。 ②He had no choice but to leave.他只得离开。 注意：besides 也是介词，意为“除……之外（还有）”。除了的部分和其他部分在同一个范围内，具有一致性。①We all went to see a film yesterday evening besides you.除你之外昨天晚上我们也都去看电影了。（你和我们都去了） ②Who is going there with Tom besides you? 除你之外还有谁和汤姆一起去？ but for 该短语介词意为“要不是……”，后接名词（=without + n.）,but for…短语相当于一个虚拟条件句，因此，句中谓语动词用虚拟语气。如： The boy would have drowned but for your help. 如果接的是句子，but for要换用成but that… 如： He would have helped us but that he was short of money at the time.(= if it had not been the fact that he was…) by prep. 乘……。用来表示方式，其后的名词为单数，且不加冠词。 例如 by bike/bus/ car /taxi/train//road/railway/land/boat/ship/ water/ sea/ 但：“步行”用on foot. 注意：若表示交通工具的名词前有限定词，则将by 改作in 或on. in one’s/the car/ bus/plane etc. on the bike by name 该介宾词组的意思是“名叫……”；“凭名字”。如： ①He met a man, John by name. ②I knew him only by name. by one’s first marriage 通过或由于某人的第一次婚姻 介词by有许多含义，在此处意为“通过”，相当于through。 He left by the first train. 他乘第一次列车离开了。 The electricity supply is operated by a switch.供电由一个开关控制。 by the age of/at the age of,by到……时为止。表示的是一段时间，句子通常用完成时态。 at在……时候。表示的是具体时间点，句子通常用一般时态。 ①By the age of ten,he had learned to play the piano.10岁的时候，他就学会了弹钢琴。 ②He was very clever.and at the age of 15 he went to college.他非常聪明，15岁时上大学了。 ③By the end of this term,we’ll have learned 2000 English words.到本学期末，我们将学会2000个英语单词。 ④At the end of this term,we’ll hold an English party.在本学期末，我们 将举行一次英语晚会. 
|
 鲜花 |
 握手 |
 雷人 |
 路过 |
 鸡蛋 |
分享
邀请
