Unit 2 Healthy eating(Period 3 Learning about language: Grammar)
9)he had better do some research.
10)they would become tired very quickly.
11)perhaps with a discount and a new sign he could win his customers back.
2. thinking and discussing
let students read aloud the sentences they picked out, think over and discuss with a partner how each of these modal verbs is being used in the situations. use the function words below to explain the meaning of the modal verbs. if students have some difficulty, give them a hand.
intention duty permission possibility guessing ability
1)possibility 2)possibility 3)possibility 4)possibility 5)guessing 6)intention 7)duty 8)intention 9)duty 10)possibility 11)ability
3. summing up: the use of ought to
ought无人称和时态的变化, 后接带to的动词不定式。ought to可表示“义务”“要求”或“劝告”, 常译作“应该”“应当”等, 和should差不多, 只是语气稍重一些; 有时表示“非常可能”的意思。否定式为ought not to(oughtn’t to), 疑问式为ought i/you/. . . to. . . ?
such things ought not to be allowed, ought they?
—ought he to go? 他应该去吗？
—yes, he ought to. 是的, 他应该去。
2. 表示“适当, 合适或应该”
coffee ought to be drunk while it is hot.
there ought to be more buses during the rush hours.
harry ought to win this race.
if he started at seven, he ought to be here now.
i think you ought to eat more body-building food.
he said i ought to do that job.
5. 表示“推测”, 意为“照说应该; 想必一定”, 后跟不定式的一般时、进行时或完成时, 分别表示对现在、现在进行或过去情况的推测。
she has had working experience before. she ought to be fit for the job.
it’s just 9 o’clock. mary ought to be doing her homework in her room now.
it ought to have rained last night.
ought to后接不定式的完成式时, 表示“本应该做某事而事实上没做”; 其否定式表示“本不应该做某事而事实上做了”。
you ought to have done these exercises because you were required to so during your holidays.
she ought not to have told him the bad news, which had a bad effect on his examinations.