的

否定前缀un­ 否定前缀in­ unconscious adj.无意识的；不知不觉的

uncomfortable adj.不舒服的

unfit adj.不合适的

unfortunate adj.不幸的 informal adj.非正式的

incorrect adj.不正确的

independent adj.独立的

inconvenient adj.不方便的 　　Ⅲ.补全短语

　　根据提示补全下列短语

　　1．on guard　 (保持)警惕

　　2．make a deal 达成协议；做成交易

　　3．hold up 举起

　　4．give away 暴露(自己的情况)

　　5．up and down 一上一下地

　　6．vary from ... to... 从......到......变化

　　7．in the distance 在远处

　　8．shake hands with 和某人握手

　　9．get involved in 被卷入......之中；热衷于；专心于

　　10．more than 超过；不仅仅

　　Ⅳ.选词填空

　　选用上述短语的适当形式填空

　　1．Danger drawing near，we must all be on guard．

　　2．The film has made a deal with the government for six of its fighter planes.

　　3．He kindly shook hands with me as usual when greeting me.

　　4．If you have any questions，please hold up your hands before asking them.

　　5．The boss felt like someone was giving away company secrets.

"on＋n."构成的介词短语一览 由up and down想到的