4。指代对象不一致
这里的指代对象不一致主要讲的是代词与被指代的人或物关系不清，或者先后所用的代词不一致。把这一项单独提出来是因为大家实在很青睐这一部分：
Mary was friendly to my sister because she wanted her to be her bridesmaid. (玛丽和我姐姐很要好，因为她要她做她的伴娘。)
读完上面这一句话，读者无法明确地判断两位姑娘中谁将结婚，谁将当伴娘。如果我们把易于引起误解的代词的所指对象加以明确，意思就一目了然了。这个句子可改为：
Mary was friendly to my sister because she wanted my sister to be her bridesmaid.
例. And we can also know the society by serving it yourself.
剖析：句中人称代词we 和反身代词yourself指代不一致。
改为：We can also know society by serving it ourselves.
以上即是托福写作中易犯的4个语法错误，虽然托福语法不再是新托福考试的考察题型，不过，语法的问题在口语、写作等各题型中都有体现，大家千万不要忽视了对托福语法的备考。
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