Making a difference（The Third Period）
2.c 大家很容易看出她不高光
3.b 牛頓自言自語(yǔ)，“為什么蘋果會(huì)落到地上，而不會(huì)飄向空中？”后來(lái)他發(fā)現(xiàn)了萬(wàn)有引力定律。
4.a 科學(xué)家預(yù)言在未來(lái)的十年內(nèi)，環(huán)境污染還會(huì)更重要。他們告戒人們?nèi)绻覀儾徊扇〈胧┙鉀Q這個(gè)問(wèn)題，我們將會(huì)毀滅我們的星球。
5.b 哈利觀察那顆星體的運(yùn)動(dòng)已有多年了，并且發(fā)現(xiàn)每76年它就輪回一圈。
6.a 警察發(fā)現(xiàn)這個(gè)人的指紋和在犯罪現(xiàn)場(chǎng)提取的不一樣后，就放他走了。
step ⅲ grammar
(teacher writes some sentences on the blackboard.)
(bb.. 1. he hoped to visit china again.
2. it took a lot of time to finish the report.
3. please give the boy something to play with.
4.he went home to see his sick mother.
5. her wish is to become a pop singer. )
t: now look at the sentences on the blackboard. and tell me the function of the underlined part in each sentence. who'd like to do the first?
(one students stands up.)
s: let me try. in the first sentence, “to visit china again” is used as the object.
t: good. the second, ma lu?
s: in the second sentence, i think, “to finish the report” is used as the attribute modifying “time”.
t: what he said is right or wrong?
ss: wrong. it is used as the subject, not the attribute.
t: yes. “to finish the report” is used as the subject. it is more usual to use formal subject “it” and the infinitive phrase is usually placed at the end of the sentence, that is “it is … to do sth. .”are you clear, ma lu?
s: yes.
t: now let's look at the third sentence. any volunteer?
s: “to play with” is used as the attribute.
t: is what she/he said right or wrong?
ss: right.
t: yes. look at the fourth sentence. li jia, you have a try.
s: here “to see his sick mother” is used as the adverbial for purpose.
t: good. now look at the last sentence. let's do it together. t and ss: “to become a pop singer” is used as the predicative.
t: now you have known some usages of the infinitive. let's do an exercise on the screen. (show the exercise on the screen.)
group the infinitives according to how they are used.
subject: attribute:
object: adverbial:
1. some things need (1)to be believed (2)to be seen.
2. the doctor told him that he may not have more than twelve months (3) to live.
3. (4)in order to get married, i needed a job, and (5)in order to get a job, i needed a phd.
4. readers were pleased and surprised (6) to find that a scientist could write about his work in a way that ordinary people could understand.