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　　please

　　表示"请",多用于祈使句中,表示客气与礼貌,后接动词原形.

　　Pleasecome in.

　　Come in,please.

　　Please go to school tomorrow.

　　Go to school tomorrow, please.

　　祈使句是表示命令,请求的句子.省略了主语you, 以动词原形开头.其否定形式是在动词原形前面加Don't.以please开头的祈使句,其否定形式为 Please don't + 动词原形.

　　Please stand up.

　　Please don't stand up.

　　Sit down.

　　Don't sit down.

　　You can watch TV at home.(改为祈使句)

　　______ _______ at home.

　　sleep

　　作动词,意为"睡,睡觉".也可作名词,意为"睡觉,睡眠".构成以下词组:

　　go to sleep

　　get to sleep

　　Please be quiet! Your father is sleeping.

　　Let's have a sleep now.

　　asleep是形容词,意为"熟睡的".多用在系动词后作表语.

　　sleepy 是形容词,意为"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"上床睡觉",强调从脱衣服到上床这一动作,表示准备睡觉,不含睡着之意.

　　(2)sleep指睡着的整个过程,用于现在进行时态中表示"正在睡觉".

　　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意为"在…期间,在…时候".多指一段时间中的某一时候或某几个时候.强调某事什么时候发生,不一定很精确.其同义词为in

　　(2)for强调多长时间,可能较准确.用来指事件持续时间.

　　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