新概念2-第16课ppt课件.pptx

Lesson 16
A polite request
Ask and answer the questions in pairs.
What happens if you park your car in the wrong place 不合适的地方
Wrong adj. 不合适的 right adj. 合适的
Notes on the text 课文注释
He is the right person who you are looking for.
The wrong person in the wrong place at the wrong time
You will be very lucky if he lets you go without a ticket.
Let (sb.) go 放开，释放，使自由，让某人去…
The man won’t let go (of) my arm.
抓住胳膊不放
Notes on the text 课文注释
However, this does not always happen.
However=but 然而
however常常放在句首或句中，
but****惯放在两个句子之间；
but转折性语义比较强，however比较弱。
Key structures 关键句型
本课关键句型：条件句
If引导的条件从句指能够发生、可能发生或可能发生过的事件。如果认为将来的事件很可能会发生，那么if从句要用一般现在时，主句用will(或shall)加动词形式或其他形式的将来时。
Key structures 关键句型
如果觉得其“肯定”程度达不到使用will的程度，或者想表达建议等其他意思，可以用别的情态动词代替will,还可以用祈使句表示请求、建议等。
You can post these letters if you want to.
If he is sleeping, don’t wake him up.
条件句 （Conditional Sentences）
类型1---真实条件句（Sentences of Real Condition)
条件句是表示在某种条件或要求下，预期会产生
某种结果的表达方法。在“真实条件句 ”中,IF-从句
中假设的情况是有可能实现或发生的.
-从句中的动词用一般现在时态,主句中的动词用
:
If he is out , I’ll call tomorrow.
If he has time,he will come.
You’ll miss the train if you don’t hurry.
He’ll get there in time if he runs.
,也只能用
一般现在时态的形式来表达,而绝不能用
将来时的形式:
If it rains tomorrow, I will stay at home.
We’ll go out for a picnic if it is fine next Sunday.
If he has enough money next year, he’ll go to Europe.
:
a).IF-从句中的动词是现在时,主句中的shall/will可以用其它情态动词代替:
If it rains,we can/must/may stay at home.
If it stops raining we can/may go out.
If you want to lose weight,you must eat less bread.
b).IF-从句中的动词用现在时,主句还可以是
“命令,恳求或劝告”
If you want to lose weight ,you had better
eat less bread.
If you want to lose weight,eat less bread.
If you see Tom tomorrow,could you ask him
to ring me?
4. IF-从句的变化:
a)从句中可以用现在进行时,表示现在的行为
或将来的安排:
If you are leaving tomorrow,I’ll send you a car
If you are looking for Peter,you’ll find him
in the library.
b).IF-从句中还可用情态动词:
He will come tomorrow if he can.
If they can hel