please

　　表示"請(qǐng)",多用于祈使句中,表示客氣與禮貌,后接動(dòng)詞原形.

　　Pleasecome in.

　　Come in,please.

　　Please go to school tomorrow.

　　Go to school tomorrow, please.

　　祈使句是表示命令,請(qǐng)求的句子.省略了主語(yǔ)you, 以動(dòng)詞原形開(kāi)頭.其否定形式是在動(dòng)詞原形前面加Don't.以please開(kāi)頭的祈使句,其否定形式為 Please don't + 動(dòng)詞原形.

　　Please stand up.

　　Please don't stand up.

　　Sit down.

　　Don't sit down.

　　You can watch TV at home.(改為祈使句)

　　______ _______ at home.

　　sleep

　　作動(dòng)詞,意為"睡,睡覺(jué)".也可作名詞,意為"睡覺(jué),睡眠".構(gòu)成以下詞組:

　　go to sleep

　　get to sleep

　　Please be quiet! Your father is sleeping.

　　Let's have a sleep now.

　　asleep是形容詞,意為"熟睡的".多用在系動(dòng)詞后作表語(yǔ).

　　sleepy 是形容詞,意為"有睡意的,困倦的".

　　My father is asleep now.

　　I'm sleepy when I listen to him.

　　go to bed和sleep

　　(1)go to bed 指"上床睡覺(jué)",強(qiáng)調(diào)從脫衣服到上床這一動(dòng)作,表示準(zhǔn)備睡覺(jué),不含睡著之意.

　　(2)sleep指睡著的整個(gè)過(guò)程,用于現(xiàn)在進(jìn)行時(shí)態(tài)中表示"正在睡覺(jué)".

　　I sleep for nine hours every day.

　　Don't make noise. Your father is sleeping.

　　Look! The baby is ____ in bed.

　　A sleep B asleep C go to bed D go to sleep

　　during/for

　　(1)during意為"在…期間,在…時(shí)候".多指一段時(shí)間中的某一時(shí)候或某幾個(gè)時(shí)候.強(qiáng)調(diào)某事什么時(shí)候發(fā)生,不一定很精確.其同義詞為in

　　(2)for強(qiáng)調(diào)多長(zhǎng)時(shí)間,可能較準(zhǔn)確.用來(lái)指事件持續(xù)時(shí)間.

　　It rained during the day.

　　He worked during the night.

　　My father slept for 10 hours yesterday.

　　-How long did you stay there?

　　-For two hours.

　　He studied very hard. He did his homework ___ the day.

　　A for B during C of D at

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