初中英语常见错误之I系列　　if 　　[误] If it will rain I wont go to school tomorrow.
　　[正] If it rains I wont go to school tomorrow.
　　[析] 由if引起的状语从句要用一般时表示将来。
　　[误] I want to know if he comes here tomorrow.
　　[正] I want to know if he will come here tomorrow.
　　[析] if所引起的如果是宾语从句则不能用一般遥时表示将来。
　　[误] I want to know if it will rain tomorrow he will come or not.
　　[正] I want to know if it rains tomorrow he will come or not.
　　[析] 这里的if从句是整个宾语从句的条件状语，所以，还应用一般时表示将来。
　　ill 　　[误] He spent many years looking after his ill father.
　　[正] He spent many years looking after his sick father.
　　[析] ill和sick都可以作表语，如： Im ill (sick).
美国英语中常用sick， 而英国英语中两者都可用，但ill一般不作定语。
　　in 　　[误] In a cold morning, I went to school alone.
　　[正] On a cold morning, I went to school alone.
　　[析] 在in the morning或in the afternoon词组中，不论在这两个名词的前或后加任何修饰词，其介词in都要变为on.
　　[误] I will finish it after two days.
　　[正] I will finish it in two days.
　　[析] 中文中几天以后可以完成，或几天后来取，在译为英文时都不要用after，而要用in.
如： He will be back in a few days.
　　in into 　　作为副词应用in，而不能用into，如： Come in, please.
又若在句中不涉及到动词的位置，只是表达空间的位置时用in，如： The teacher in the office is my mother.
但在go, run, come, walk, dive等词后则要用into.
如： She dives into the river.
　　instead 　　[误] The boy stayed in bed all day instead to go to school.
　　[正] The boy stayed in bed all day instead of going to school.
　　[析] instead of其后要接动名词、名词或代词，而不能用不定式，如： I choose this book instead of that one.
　　[误] The beer here is not good, so I drink wine instead of it.
　　[正] The beer here is not good, so I drink wine instead.
　　[析] instead是副词，而instead of是介词短语。
如： If you are not free, you may come another day instead.
　　interest 　　[误] He has a great interest for physics.
　　[正] He has a great interest in physics.
　　[误] He has some interest in many companies.
　　[正] He has some interests in many companies.
　　[析] interest作为兴趣讲可用作遥数名词，但作为利息、股份讲时为可数名词。
　　[误] This is an interested book.
　　[正] This is an interesting book.
　　[析] 修饰物时应用interesting, 如，an interesting film，而讲某人对某事感兴趣时要用过去分词interested，如： Im interested in this play.
但他是一个十分有趣的人。
应译为He is an interesting man.
所以interesting是令人感兴趣之意，而interested则表示某人对某事物感兴趣，多用be interested in something这一句型。
　　invent 　　[误] America was invented by Christopher Columbus in 1492.
　　[正] America was discovered by Christopher Columbus in 1492.
　　[析] invent意为发明即从无到有，如： Compass was invented by the Chinese people.
而discover则意为发现。
　　it 　　[误] That takes me ten years to finish this work.
　　[正] It takes me ten years to finish this work.
　　[析] it在这个句中的语法作用是形式主语，而真正的主语是句子后面的不定式。
有的句子要用it作形式主语或形式宾语，如： I think it difficult to learn English well.