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　　13.few, a few; little , a littl

　　虽然都表示“少”，但

　　·few, a few是可数的, little, a little是不可数的。

　　·a few, a little含肯定意味，few, little含否定意味。

　　(1) They have a little ink, don\'t they? 他们有一点墨水，是吗?

　　(2)They have little ink, do they? 他们几乎没有墨水，是吗?

　　(3)She has a few Chinese friends, doesn\'t she? 他有几位中国朋友，是吗?

　　(4)She has few Chinese friends, does she?他几乎没有几位中国朋友,是开吗

　　(5)She has a little dog.她有一只小狗。

　　14.not … until, until

　　not … until 直到…才… (主句动词是短暂性动词)

　　(1)He didn\'t go to bed until his mother came back..

　　until 一直到… (主句中使用延续性动词)

　　(2)I study hard until it is midnight every day.