一、一般现在时:
概念:经常、反复发生的动作或行为及现在的某种状况.
时间状语:always,usually,often,sometimes,every week (day,year,month…),once a week,etc.
基本结构:①be动词;②行为动词
否定形式:①am/is/are+not;②此时态的谓语动词若为行为动词,则在其前加don't,如主语为第三人称单数,则用doesn't,同时还原行为动词.
一般疑问句:①把be动词放于句首;②用助动词do提问,如主语为第三人称单数,则用does,同时,还原行为动词.
二、一般过去时:
概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为.
时间状语:ago,yesterday,the day before yesterday,last week(year,night,month…),in 1989,just now,at the age of 5,one day,long long ago,once upon a time,etc.
基本结构:①be动词;②行为动词
否定形式:①was/were+not;②在行为动词前加didn't,同时还原行为动词.
一般疑问句:①was或were放于句首;②用助动词do的过去式did 提问,同时还原行为动词.
三、现在进行时:
概念:表示现阶段或说话时正在进行的动作及行为.
时间状语:now,at this time,these days,etc.
基本结构:am/is/are+doing
否定形式:am/is/are+not+doing.
一般疑问句:把be动词放于句首.
四、过去进行时:
概念:表示过去某段时间或某一时刻正在发生或进行的行为或动作.
时间状语:at this time yesterday,at that time或以when引导的谓语动词是一般过去时的时间状语等.
基本结构:was/were+doing
否定形式:was/were + not + doing.
一般疑问句:把was或were放于句首.
五、现在完成时:
概念:过去发生或已经完成的动作对现在造成的影响或结果,或从过去已经开始,持续到现在的动作或状态.
时间状语:recently,lately,since…for…,in the past few years,etc.
基本结构:have/has + done
否定形式:have/has + not +done.
一般疑问句:have或has.
六、过去完成时:
概念:以过去某个时间为标准,在此以前发生的动作或行为,或在过去某动作之前完成的行为,即“过去的过去”.
时间状语:before,by the end of last year(term,month…),etc.
基本结构:had + done.
否定形式:had + not + done.
一般疑问句:had放于句首.
七、一般将来时:
概念:表示将要发生的动作或存在的状态及打算、计划或准备做某事.
时间状语:tomorrow,next day(week,month,year…),soon,in a few minutes,by…,the day after tomorrow,etc.
基本结构:①am/is/are/going to + do;②will/shall + do.
否定形式:①was/were + not; ②在行为动词前加didn't,同时还原行为动词.
一般疑问句:①be放于句首;②will/shall提到句首.
八、过去将来时:
概念:立足于过去某一时刻,从过去看将来,常用于宾语从句中.
时间状语:the next day(morning,year…),the following month(week…),etc.
基本结构:①was/were/going to + do;②would/should + do.
否定形式:①was/were/not + going to + do;②would/should + not + do.
一般疑问句:①was或were放于句首;②would/shou
China is catching up rapidly with the developed countries in R&D of avdanced technology,which is somewhat triggered by the striking performance of its neighbour - Japan.The Chinese government has embarked on a techonology-revamping strategy to enhance the country's technological power,witnessed by the ambitious moon investigating plan and increased fund earmarked for R&D activities.Private companies,many of which are funded by venture capital firms,have shown increasing stronger presence in the marketplace.The products are mostly aimed at satisfying civil techonogical needs.In spite of the momentum,the country still needs to reform its education system,as the traditional way of teaching hinders greatly the process of innovation.Out-of-box thinking should be encouraged.The country is to become a unneglectable power in the next 20 or 30 years in technology development,and the input of talents will play a crucial part in that process.
写英语作文:将来我国科技是什么样的
写英语作文:将来我国科技是什么样的
词数:80-120字
他将给我们什么大的影响
词数:80-120字
他将给我们什么大的影响
英语人气:671 ℃时间:2019-11-10 11:00:48
优质解答
我来回答
类似推荐
猜你喜欢
- 1客货两车同时从甲乙同时相向而行客车每小时比货车多行10千米3小时相遇,相遇时客车行全程28分之15,两地
- 2这可是一件新鲜事的新鲜是什么意思?要换另一个词,
- 3汉语中 怎么区分介词连词副词助词?
- 4月光如银(带比喻的成语)
- 5His mother is too busy_________(do) the housework_______(watch)TV.
- 6已知关于x的方程x²+2x+2根号下x²+2x+2p-p²=0.其中P是实数
- 71.一件汗衫原价每件24元,后因天气变凉降价出售,降价后当天销售量增加了一半,收入也增加了四分之一,这件汗衫每件降价( 35 )元
- 8有一架直升飞机从海拔1000米的高原上起飞,第一次上升了1500米,第二次上升了-1200米,第三次上升了1100米,第四次上升了-1700米,求此时这架飞机离海平面多少米?
- 9两种金属的混合物粉末30克,跟足足量稀硫酸反应时,恰好得到22.4L氢气,
- 10On board the plane there are over two hundred passengers,about one third of whom were forigners.