祈使句易错题分析

请看下面一道题：

Entering the room, the headmaster said, “Everyone _________ quiet, please.”

A. keep                      B. keeps                   C. is keeping               D. to keep

【分析】此题容易误选B，因为主语 everyone通常被视为第三人称单数，所以其后谓语用 keeps。但事实上，最佳答案应是A，注意句末的 please，它表明此直接引语为祈使句，只不过该祈使句带上 everyone 这个主语。既然是祈使句，所以动词用原形，即选A。又如：(from www.nmet168.com)

(1) Someone _________ the door; be quick, please.

A. open                       B. opens                     C. is opening                D. to  open

(2) Everyone _________ over, please.

A. come                       B. comes                   C. coming                     D. to come

以上两题答案均选A，即选动词原形。两句均属带主语的祈使句，注意句末的 please。