Question

She ______have stopped her work halfway.

A．ought to not	B．ought not to
C．not ought to	D．does not ought to

Answer 1

B

试题分析：句意：她不应该半路停止工作。这里是ought to have done否定的形式，应该是ought not to have done，故选B。
点评：本题难度适中。对于情态动词的各种否定形式也是高考常考的内容，需要考生牢记它们的用法，这里考生容易误选A。
即学即练：—I didn’t tell my parents the secret yesterday.
—But you __________.
A. ought to do          B. ought to
C. should               D. ought to have
解析：D。句意：因为上半句是过去时，所以是对过去事实表示推测，应该用“情态动词+完成时”。而D项就是这种形式的省略。