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　　if ��

　�。壅`］ If it will rain I won‘t go to school tomorrow.��

　　［正］ If it rains I won‘t go to school tomorrow.��

　�。畚觯� 由if引起的狀語從句要用一般時表示將來。��

　�。壅`］ I want to know if he comes here tomorrow.��

　�。壅�］ I want to know if he will come here tomorrow.��

　　［析］ if所引起的如果是賓語從句則不能用一般現在時表示將來。��

　　［誤］ I want to know if it will rain tomorrow he will come or not.��

　�。壅�］ I want to know if it rains tomorrow he will come or not.��

　　［析］ 這里的if從句是整個賓語從句的條件狀語，所以，還應用一般時表示將來。��

　　ill ��

　�。壅`］ He spent many years looking after his ill father.��

　�。壅�］ He spent many years looking after his sick father.��

　�。畚觯� ill和sick都可以作表語，如： I‘m ill (sick). 美國英語中常用sick， 而英國英語中兩者都可用，但ill一般不作定語。��

　　in ��

　　［誤］ In a cold morning, I went to school alone.��

　�。壅�］ On a cold morning, I went to school alone.��

　�。畚觯� 在in the morning或in the afternoon詞組中，不論在這兩個名詞的前或后加任何修飾詞，其介詞in都要變為on.��

　　［誤］ I will finish it after two days.��

　�。壅�］ I will finish it in two days.��

　�。畚觯� 中文中幾天以后可以完成，或幾天后來取，在譯為英文時都不要用after，而要用in.如： He will be back in a few days.��

　　in into ��

　　作為副詞應用in，而不能用into，如： Come in, please. 又若在句中不涉及到動詞的位置，只是表達空間的位置時用in，如： The teacher in the office is my mother. 但在go, run, come, walk, dive等詞后則要用into. 如： She dives into the river.��

　　instead ��

　　［誤］ The boy stayed in bed all day instead to go to school.��

　�。壅�］ The boy stayed in bed all day instead of going to school.��

　�。畚觯� instead of其后要接動名詞、名詞或代詞，而不能用不定式，如： I choose this book instead of that one.��

　　［誤］ The beer here is not good, so I drink wine instead of it.��

　�。壅�］ The beer here is not good, so I drink wine instead.��

　�。畚觯� instead是副詞，而instead of是介詞短語。如： If you are not free, you may come another day instead.��