人教版（2019）必修第二册 Unit4 History and traditions语法难点 精讲课件2(共28张PPT)

(共28张PPT)
“if+any”的省略句
教材原句： So what is the difference between them, if any
句型分析：本句中if any是省略句，补全句子是：if there is any difference.
翻译：如果有的话，那么他们之间的区别是什么？
“if any”的省略结构
“if+any”的省略结构
Correct errors, if any.
如果有错误就改正。
=Correct errors, if there are any errors.
if any 如果有…；即使有…
典例分析
1
There are few people nowadays, if any, who remember him.
当今记得他的人，如果有的话，也不多了。
= There are few people nowadays, if there are any people，who remember him.
if any 如果有…；即使有…
典例分析
1
What quality, if any, do you like the most about your partner
你最喜欢你同伴的哪一点，假如有的话？
= What quality, if there is any quality, do you like the most about your partner
if any 如果有…；即使有…
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典例分析
“if+其它”的省略结构
If possible, let me know beforehand.
如果可能，可在事前通知我。
if possible 如果可能
典例分析
If necessary, ring me at home.
如果有必要，可往我家里打电话。
if necessary 如果必要
典例分析
She seldom, if ever, goes to the cinema.
她难得看电影。
if ever 如果曾经有的话（极少，难得），常和seldom连用
典例分析
I may be free this evening. If so, I’ll come round and see you.今晚我可能有空。要是有空的话我会过来看你。
if so 如果是那样的话
典例分析
Ask her if it is convenient tonight. If not, can she suggest another possible time
问一下她今晚方便不方便。如果不方便的话，她可不可以提出一个可行的时间。
if not 如果不的话
典例分析
He seldom, ________, travels abroad.
There are few mistakes in his homework, _______.
I might see you tomorrow._____, then it will be Staurday.
He may be busy. ____, I’ll call him later.
用if any, if ever, if so, if not填空
考点追击
if ever
if any
If not
If so
Sum up: “if +any”的省略句
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2
if any如果有的话；
“if+其它”的省略结构
if possible/necessary如果可能/必须
if ever 极少，难得
if so/not如果是/不是
“while+分句”结构
教材原句： On a quiet morning in the mountains, feel the sun on your skin, and breathe in the sweet scent of fresh flowers while birds greet the new day with their morning song.
句型分析：在本句中，feel…and breathe…是祈使句；while连接并列分句。
翻译：在山中宁静的早晨，感受你皮肤上的阳光，呼吸新鲜花朵的芬芳，然而鸟儿用晨歌迎接新的一天。
while连接并列分句
while作并列连词，表示对比，意为“然而”
I was never very neat while my roommate Kate was extremely organized.
分句+while+分句
典例分析
while作并列连词，表示对比，意为“然而”
1
There is plenty of rain in the southeast, while there’s little in the northeast.
Some people waste food while others haven’t enough.
while和前面分句可用逗号隔开，强调前后两分句之间的对比.
典例分析
while作并列连词，表示对比，意为“然而”
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while的其它用法
Mary made coffee while her guests were finishing their meals.
While I was playing the piano, she was dancing.
作从属连词，引导时间状语从句，意为“当…的时候”。
典例分析
1
While the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
=although
作从属连词，引导让步状语从句，意为“虽然，尽管”。
典例分析
2
While there is water and air there will be life.
=as long as
作从属连词，引导条件状语从句，意为“只要”。
典例分析
3
Would you like to come in and rest for a while
once in a while 偶尔；间或
作名词，表示“一会儿或一段时间”。
典例分析
4
特别提醒
He likes playing football, while his wife likes playing volleyball.
He was very tired, but he kept on working.
辨析while和but的区别：
while强调对比，“然而”
but强调转折，“但是”
_____ I see what you say, I can’t agree with you.
---I wonder how much you charge for your services
---The first two are free______ the third costs $30.
3._____ the students came from different countries, they got along quite well in summer camp.
完成句子。
考点追击
While
while
While
Sum up: “while+分句”结构
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while作并列连词，表示对比，意为“然而”
while的其他用法
Bye-bye!