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编辑推荐：2015成人英语三级考试复习重点汇总
if only(=How I wish)引导的虚拟语气
属于时态型虚拟语气，表示一种强烈的愿望、遗憾或不满，意为“要是……就好了”，“但愿”。
1)If only I had more money! I could buy some new clothes.
2)If only I had not cheated in the examination!
3)If only we had done as we were told! This would never have happened.
4)If only I were ten years younger!
5)If only you had told me in advance!
6)If only I had not married before I met you!
7)If only you had arrived a little earlier!
注意: if only与only if的区别：only if中only只起到加强、突出的作用，if的词义并为改变，意为“只有在……条件下”，表示条件的唯一性。如：
8). Only if you help me can I succeed.
9)I will go home only if you go with me.
10)---Will you come to Birthday Party tomorrow? --- Only if you promise not to invite Tom.
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