译林版(2019)选择性必修第一册Unit 1 Food matters Grammar and usage 课件-(16张ppt)

(共16张PPT)
Grammar & Usage
Grammar & Usage
-To infinitives as subjects and predicatives
B4U1
Class 108 Christina Chu
Step 1 Read and fill
Step 1 Read and fill
In the past, the author liked to eat ___________.
The author was ______ to try new restaurants.
To eat out was also _____________to enhance the relationship with friends.
Then the author came across___________.
There are a lot of ________ to choose from.
It offers __________________ for users to follow step by step.
In the last few week, the author engaged in home cooking.
Cooking at home is _____.
The author can cook exactly _____he wants.
Cooking at home is ______.
at a restaurant
a cooking app
eager
a social activity
recipes
detailed instructions
cheaper
what
healthier
reasons
functions
benefits
Step 1 Read and fill
Step 1 Read and fill
In the past, the author liked to eat ___________.
The author was ______ to try new restaurants.
To eat out was also _____________to enhance the relationship with friends.
Then the author came across___________.
There are a lot of ________ to choose from.
It offers __________________ for users to follow step by step.
In the last few week, the author engaged in home cooking.
Cooking at home is _____.
The author can cook exactly _____he wants.
Cooking at home is ______.
at a restaurant
a cooking app
eager
a social activity
recipes
detailed instructions
cheaper
what
healthier
reasons
functions
benefits
Q1：In what order is the text organized
A:It is organized in the order of time.
Q2: Can you find more benefits about cooking at home？
A:In the context of COVID-19 pandemic, cooking at home can be a useful skill, especially for young people living alone.
Q3: Do you know other ways to access recipes online
A:Cooking channels on video websites.
Step 2 Read and learn
Step 2 Read and learn
To infinitives as subjects To infinitives as predicative
it
be
Step 2 Read and learn
Step 2 Read and learn
①
②
③
Q：What are the functions of the three to-infinitives
A:
①object complement
②attributives
③adverbials of purpose
Step 3 Conclusion
Step 3 Conclusion
Step 3 Conclusion
Step 3 Conclusion
Helping kids to surf the Internet without being cheated by evil frauds online is my duty.
It is no good/use doing sth.
It is (a great) fun doing sth.
It is a waste of time doing sth.
Step 3 Conclusion
Step 3 Conclusion
如果主语用了不定式,表/宾语也要用不定式;主语用了动名词,表/宾语也要用动名词，如:
To see is to believe.= Seeing is believing.
It is better to stay home than ___ （go）out.
不定式做主语常表示具体的某一动作;表示泛指或一般的抽象的概念时，多用动名词，如:
_____(read) is an ideal way to acquire knowledge and broaden our horizons.
_____(read) the book again is necessary.
不定式可以和when,where,how,what,whether等连用,在句子中做主语、宾语和表语，而动名词则不能，如:
How to solve the problem is a hot potato.
Where to put the box seems hard to decide.
Whether to do it hasn’t been decided.
What to do next is up to you.
it 作形式主语时，还常用于 It takes sb. some time/money to do sth.这一句型中，如：
It took me more than an hour to do my homework yesterday evening.
昨天晚上我做作业用了一个多小时。
to go
Reading
To read
Step 3 Conclusion
Step 3 Conclusion
Step 3 Conclusion
Step 3 Conclusion
（2）动词不定式作表语时，可表示目的。
The next step is to make sure that you know exactly what is required.
The purpose of education is ________ ________ a fine personality in children.教育的目的是发展儿童良好的个性。
（3）动词不定式作表语时，可表示事态发展的结果、预期的结果或不幸的命
运。
He was to perish in a shipwreck and to leave a wife and two children.
You must speak out, if we are ________ ________ friends.如果我们还想继续做朋友的话，你就必须痛痛快快地把话都说出来。
Step 3 Conclusion
Step 3 Conclusion
（4）动词不定式作表语且用于第一人称的疑问句时，可表示征求意见。
What am I to say if they ask me the question
What am I ________ ________ if I have no money 如果没有钱，我该怎么办呢？
（5）作表语的动词不定式用于被动语态时，相当于 can/could, should, ought to,
must，具有情态意义。
You are to be rewarded.你应该受到奖励。(相当于 should be)
It's nowhere to be found.哪儿也找不到它。(相当于 can't be)
These books ________ ________ ________ ________ ________.这些书不应该卖掉。
（7）动词不定式作表语时，可用于表示“同意、安排、命令、决定、劝告、
意愿、禁止”等。
They are to marry next week.他们将在下周结婚。(表示“安排”)
Children are not to smoke.儿童不准吸烟。(表示“禁止”)
You must be patient and persistent if you are ________ ________.想要成功，你就必须有耐心，有毅力。
（8）动词不定式作表语时，可用主动形式表示被动意义。
She is to blame.她应该受到责备。
还有许多事要做。
A great deal is yet ________ ________.
Step 3 Conclusion
Step 3 Conclusion
Step 3 Conclusion
Step 3 Conclusion
Step 3 Conclusion
Step 3 Conclusion
Step 4 Utilization
Step 4 Utilization
Located
to see
to turn
to sit
painted
ranging
to be
to invite
win/lose a bet; have/put a bet on sth
One’s bet is that ……
the/your best bet
a good/safe bet
bet…on/against sth
Two young men bet their tickets on the card game and to lost them to Jack Dawson.
I (will) bet!
You bet!
Q:What makes eating there enjoyable
Step 4 Utilization
Step 4 Utilization