高中英语外研版 (2019)必修 第二册Unit 1 Food for thought完美版课件ppt

这是一份高中英语外研版 (2019)必修 第二册Unit 1 Food for thought完美版课件ppt，共13页。PPT课件主要包含了b dare ，c have to等内容，欢迎下载使用。

Activity 1
Match the mdals t their meanings, and summarize their functins.
strng advice
Read the intrductin t an app, fill in the blanks with mdals, and explain their functins.
aren’t able t
be afraid t d smething
nt be necessary t d smething
be necessary t d smething
have the ability t d smething
dn't have the ability t d smething
give advice t d smething
needn’t / dn’t have t
Cmplete the tips fr gd table manners with the crrect frms f mdals
What are mdals?
In English grammar, a mdal, als knwn as a mdal auxiliary r mdal verb, is a verb that cmbines with infinitive withut ‘t’ (不带t的不定式) t express pssibility, certainty, permissin, request, ability , bligatin, etc.
a. be able t
Meaning: t indicate ability
Use ‘be able t’ t fill the blanks.Up till nw, he _________________get in tuch with her.Yu ____________speak perfect English very sn.I regret ________________help her.
hasn’t been able t
will be able t
nt being able t
What’s the difference between ‘be able t’ and ‘can/culd’?
Examples：He can swim.I’m able t express my idea in a clear way.I culd / was able t play the pian when I was yung.
They are used t indicate ability.
ExamplesHe culd swim acrss the river.Thugh he was sick, he was able t swim acrss the river. We culd reach the tp f the muntain. After five hurs f climbing, we were able t reach the tp f the muntain.
Thugh he was sick
After five hurs f climbing
‘was/were able t’ means that yu succeeded in ding sth r managed t d sth in the past.
Benny, the Plish scientist, has spent his lifetime studying active vlcanes and deep caves in all parts f the wrld. In 1948, he went t a lake in the Cng t bserve a new vlcan which he later named Kitur. Benny ___________ set up his camp very clse t the vlcan while it was erupting vilently. Thugh he managed t take a number f brilliant phtgraphs, he ___________________ stay near the vlcan fr very lng. He nticed that a river f liquid rck was cming twards him. It threatened t surrund him cmpletely, but Benny managed t escape just in time. He waited until the vlcan became quiet and he ___________ return tw days later. This time, he managed t climb int the muth f Kitur s that he _________ take phtgraphs and measure temperatures. Benny has ften risked his life in this way. He ______________ tell us mre abut active vlcanes than any man alive.
culdn’t/wasn’t able t
has been able t
Meaning: t be brave enugh t d sth
Dare he climb the tree? ---N, he dare nt. He dare nt g there because it is very dangerus.He desn’t dare t crss the river.He dares t crss the river.
rdinary verb
Meaning: t indicate bligatins.‘have t’is a semi-mdal verb. It is like a mdal verb because it fulfils a specific functin, but it behaves like an rdinary verb in its frmulatin.
It has different frms accrding t number, persn and tense:I have t; he has t; she had t etc.
Meaning: t indicate bligatins.
② Think : what’s the negative frm f ‘have t’?I dn’t have t. She desn’t have t.③ It can cmbine with ther mdal verbs:Yu will have t. He might have t.
d. had better
Meaning: t express suggestins, hpes and warningsFrm: had better d sth
She’d better get here sn, r she’ll miss the pening ceremny.They had better nt be late.