please

　　表示"請",多用于祈使句中,表示客氣與禮貌,后接動詞原形.

　　Pleasecome in.

　　Come in,please.

　　Please go to school tomorrow.

　　Go to school tomorrow, please.

　　祈使句是表示命令,請求的句子.省略了主語you, 以動詞原形開頭.其否定形式是在動詞原形前面加Don't.以please開頭的祈使句,其否定形式為 Please don't + 動詞原形.

　　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

　　作動詞,意為"睡,睡覺".也可作名詞,意為"睡覺,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".多用在系動詞后作表語.

　　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",強(qiáng)調(diào)從脫衣服到上床這一動作,表示準(zhǔn)備睡覺,不含睡著之意.

　　(2)sleep指睡著的整個過程,用于現(xiàn)在進(jìn)行時態(tài)中表示"正在睡覺".

　　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…時候".多指一段時間中的某一時候或某幾個時候.強(qiáng)調(diào)某事什么時候發(fā)生,不一定很精確.其同義詞為in

　　(2)for強(qiáng)調(diào)多長時間,可能較準(zhǔn)確.用來指事件持續(xù)時間.

　　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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