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　　watch/look/see/read

　　(1)watch 作及物动词,意为"观看,注视",指看电视,看电影,比赛等.强调长时间观看某一活动的场面.

　　I often watch TV at home.

　　(2)look强调看的动作,不注重结果.为不及物动词,接宾语时用介词at

　　Look at the blackboard, please.

　　(3)see强调看的结果为及物动词,后面可以直接加宾语.

　　I can't see any birds in the tree.

　　(4)read作及物动词,意为"看,读",其宾语为"书,报纸,杂志"等.

　　My father likes reading newspaper.

　　-Where is Jim? -He ____ a picture book in the library.

　　A is reading B is look at C is seeing D is watching

　　clean

　　(1)作动词,意为"打扫,清除".

　　We clean our classroom every day.

　　It's important for us to clean our bedroom.

　　(2)作形容词,意为"干净的,清洁的".

　　My room is very clean.

　　We should keep clean.

　　(3)cleaner意为"清洁工人".

　　There is a cleaner working on the road.

　　(4)do some cleaning意为"打扫卫生".

　　It's time for us to do some cleaning.

　　Tom does some cleaning every day.

　　Let's _____(clean)the classroom now.

　　do homework

　　do homework=do one's homework做(某人)家庭作业.

　　one's为形容词性物主代词.homework为不可数名词.

　　I do my homework at school.

　　Tom doesn't do his homework at home.

　　homework是由名词与名词构成,类似的词还有:

　　basketball bedroom newspaper classroom

　　policeman backpack housework businessman

　　schoolbag football watermelon

　　They are doing _____ at home now.

　　A homeworks B homework

　　C a homework D an homework