助动词是协助主要动词构成谓语动词词组的词, 助动词是语法功能词,自身没有词义,不可单独使用,助动词用法有一下几种:
1)have +过去分词,构成完成时态,例如:
He has left for London. 他已去了伦敦。
By the end of last month, they had finished half of their work.
上月末为止,他们已经完成工作的一半。
2)have + been +现在分词,构成完成进行时,例如:
I have been studying English for ten years.
我一直在学英语,已达十年之久。
3)have+been +过去分词,构成完成式被动语态,例如:
English has been taught in China for many years.
中国教英语已经多年。
助动词be的用法
1) be +现在分词,构成进行时态,例如:
They are having a meeting. 他们正在开会。
English is becoming more and more important. 英语现在越来越重要。
2) be + 过去分词,构成被动语态,例如:
The window was broken by Tom.. 窗户是汤姆打碎的。
English is taught throughout the world. 世界各地都教英语。
3) be + 动词不定式,可表示下列内容:
a. 表示最近、未来的计划或安排,例如:
He is to go to New York next week.. 他下周要去纽约。
We are to teach the freshpersons. 我们要教新生。
说明: 这种用法也可以说成是一种将来时态表达法。
b. 表示命令,例如:
You are to explain this. 对此你要做出解释。
He is to come to the office this afternoon. 要他今天下午来办公室。
c. 征求意见,例如:
How am I to answer him? 我该怎样答复他?
Who is to go there? 谁该去那儿呢?
d. 表示相约、商定,例如:
We are to meet at the school gate at seven tomorrow morning. 我们明天早晨7点在校门口集合。
英国:圣诞节收到无人机礼物?先通过考试再试飞
国际英语资讯:Brazils prosecutor-general formally accuses President Temer of corruption
The Ideal Career 理想的职业
国内英语资讯:China, Jamaica pledge to enhance cooperation
爱国主义教育 Education in Patriotism
打扫卫生 Cleaning Day
国际英语资讯:Rwandan president welcomes China import expo
和增高鞋垫说拜拜,高跟鞋回归男士时尚
国际英语资讯:Garbage piling up Greek cities as sanitation workers protest enters 2nd week
美印领导人保证加强安全增进贸易
委内瑞拉总统:警方直升机袭击最高法院
国内英语资讯:China urges India to withdraw border guards crossing the boundary
国内英语资讯:Senior lawmakers review draft laws, resolutions
众议院通过打击非法移民的议案
联合国宣布哥伦比亚冲突正式结束
国际英语资讯:Polish prime minister announces new government
国内英语资讯:Chinese vice premier hails cooperation between Chinese, Namibian medical workers
体坛英语资讯:Sudden withdrawal issue to be investigated at ITTF China Open
关于未来,人类最需要了解的10件事
土耳其:军方对叙利亚库尔德人予以还击
国际英语资讯:Chinese embassy makes donation to help disabled children in Mongolia
体坛英语资讯:Real Madrid top La Liga as Barca thrash Sevilla
国际英语资讯:Supreme Court allows Trumps revised travel ban in part
外交天团又出新词:“长臂管辖”火了!
国内英语资讯:Chinese VP to attend second Paris Peace Forum
芬兰公民拿无条件保障金后压力小、干劲高
国内英语资讯:Chinese president meets Finnish PM on strengthening cooperation
Dirty work?
国际英语资讯:Iraqi forces free neighborhood as battles continue in Mosuls old city
国际英语资讯:U.S., Indian leaders vow to boost trade, anti-terror cooperation
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |