关于IN CASEThey watched him closely in case he should escape.W

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关于IN CASE
They watched him closely in case he should escape.
Write the telephone number down in case you forget.
为什么第一句话in case 后面是should + v原形 ,而第二句话in case 后面直接+ V原形?

例:They should arrive at noon.她应该在中午到达
Shoud用在第二,三人称中,意思,表示"应该""推断会肯定发生".
所以前句+should,表示说知人有说他会肯定escape的.要防着点.
而后句,不可能说别人一定会忘记.所以不能用should.不是不能加,但意思不一样了,+shuld,多少有点"说话冲",不礼貌.说话人怎么就知道别人一定会忘.

he took his raincoat with him in case it should rain中should能 He may be late,in which case,we should wait far him.老师说这里有定语 He left early in case he should miss the last train.的should是关于in that case In case (that) John comes/should come,please tell him to wai I watched him until he disappeared from sight in the distanc --- You should have stopped him when he _______ in anger. Should he come ,say 'Nobody in' to him He jotted the address down in case he ( )it. A should forget 请翻译She doesn't let him leave the train in case he gets lost 关于虚拟语气in case In case it should be lost.其中的should