问题
选择题
When a pencil is partly in a glass of water, it looks as if it ______.
A．breaks
B．has broken
C．were broken
D．had been broken
答案
C.
as if 引导的句子，
有时用虚拟语气，有时不用。原则上说，若指事实或可能为事实，不用虚拟语气；若指现在，从句谓语动词用一般过去时（be 用 were）；若指过去用过去完成时，若指将来用过去将来时或用 were to do sth