人教版初中英语八年级上册Unit 2知识点

Unit 2 How often do you exercise?1. on weekends 在周末（泛指）  on the weekend 在周末（特指）美式英语英式英语：at weekends/at the weekend 在周末on weekdays 在工作日 2. help sb. with sth= help sb (to) do sth.  帮助某人做某事  help oneself (to sth)  款待；随便吃/喝  can’t / couldn’t help doing sth 情不自禁做某事 3.辨析：sometimes; some times; sometime; some timesometimes频度副词有时动作发生的不经常性，提问用how oftensome times名词短语几次；几倍提问用how many timessometime副词某个时候提问用whensome time名词短语一段时间提问用how longSometimes I get up late.I have read the story some times.I decide to try paragliding with my sister sometime next week.They will live in Beijing for some time. 4. 辨析：how often; how long; how far; how soonhow often多久一次提问动作发生的频率how long多长时间；（物体）多长询问时间的长短或物体的长度how far多远询问距离how soon多久以后询问将来的时间 5. at once 立刻，马上  once or twice 一两次  once again 再一次  think twice 再三考虑频率的常用表达：次数+a+day/ week/ month….                Every +day/ week/month…. 6. 辨析：use/ with/inuse动词作谓语I use the pen to write.with介词作状语（用身体部位，工具等）I write with a pen.in介词作状语（用语言，声音，材料等）She can give a talk in English.  7.How about…..?=What about……?  …….怎么样？用来向对方询问情况或征求意见 at least 至少                           at most 最多 be good for 对…..有益                    be good with  善于应对…..  be good at  擅长                        be good to    对….友好   be/ stay/ keep in good health=be/ stay/ keep healthy 保持健康 8. ask sb. about sth 询问某人关于某事ask sb. sth. 询问某人某事ask about sth. 询问有关某事的情况ask sb. for sth.=ask for sth. from sb. 向某人要某物 9. the result of ……       …….的结果  as a result  结果是，因此  as a result of 由于   not….at all 一点儿也不；根本不  not at all 没关系，别客气   the answers to ….questions     ……问题的答案/回答  the key to the door  门的钥匙  the solution to the problem  这个问题的解决办法  the ticket to the movie 电影票 10. change one’s mind_________________   make up one’s mind_______________________   in one’s mind________________   keep one’s mind on sth___________________   keep….in mind_________ 11. such+a/an+形容词+可数名词单数    如此…的一个….   such+形容词+可数名词复数/不可数名词         如此…..的……   It is such a long way from here.   They’re such nice people. 12. 辨析spend花费（时间，金钱等）主语是人spend….on sth/spend…doing sthcost价格为；花费主语是物Sth. cost（s）sb. some moneytake花费（时间）形式主语是itIt takes sb. some time to do sth.pay支付（钱）主语是人Pay….for sth. 13. be afraid to do sth 害怕去做某事   be afraid of sb/sth 害怕某人/某事   be afraid of doing sth 害怕做某事   I’m afraid （+that ）从句    恐怕……,很抱歉…….    more than 多于                   less than少于 14. 辨析none指人/物可单独使用，也可接of;后接可数名词复数或不可数名词None of 与可数名词复数连用时，谓语动词用单数或复数；与不可数名词单数连用时，谓语动词用单数用于回答how many或how much 开头的问句no one指人单独使用，不可与of连用作主语时，谓语动词用单数用于回答who 开头的问句