摘要： 在if only感叹句中 if only表示“但愿-- .“要是--就好了 .句中的谓语动词要用虚拟语气.其构成的方法与wish后的宾语从句基本相同. If only Xiao Hua’s mother were still alive! If only I had known the answer when my teacher questioned me. If only I could fly to the moon in Shenzhou Ⅷ spaceship.

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