If he ( )help me,I should be very grateful to you.为什么只能填shou
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If he ( )help me,I should be very grateful to you.为什么只能填should而不能填would?
should 是表示虚拟语气的
对于与将来事实相反的情形,请注意以下几点:一是这里说的与将来事实相反,实为对将来情况的推测;二是此用法中的条件从句谓语除用过去式外,有时也用“should+动词原形”(表示可能性极小,常译为“万一”)或“were to+动词原形”(表示与将来事实相反的假设);三是当条件从句使用“should+动词原形”这样的谓语时,主句谓语除可用“should (would,could,might)+动词原形”这样的虚拟语气外,也可用直陈语气或祈使语气:
If it should rain tomorrow,don’t expect me.万一明天下雨,就不要等我了.(祈使语气)
If I should see him,I’ll tell him.万一我见到他,我就告诉他.(直陈语气)
对于与将来事实相反的情形,请注意以下几点:一是这里说的与将来事实相反,实为对将来情况的推测;二是此用法中的条件从句谓语除用过去式外,有时也用“should+动词原形”(表示可能性极小,常译为“万一”)或“were to+动词原形”(表示与将来事实相反的假设);三是当条件从句使用“should+动词原形”这样的谓语时,主句谓语除可用“should (would,could,might)+动词原形”这样的虚拟语气外,也可用直陈语气或祈使语气:
If it should rain tomorrow,don’t expect me.万一明天下雨,就不要等我了.(祈使语气)
If I should see him,I’ll tell him.万一我见到他,我就告诉他.(直陈语气)
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