［误］ Because he didn't study hard, so he didn't pass the exam.
［正］ He didn't pass the exam because he didn't study hard.
［析］ because 与 so在英文中两者不能并用的，只能在句中用其一。
［误］ He was such excited that he could not speak.
［正］ He was so excited that he could not speak.
［析］ so与such的用法可以分为四种情况，①用于单数可数名词之前，其格式是such+不定冠词+形容词+单数可数名词，如：It is such a beautiful book that every child likes it. 也可以用so, 其格式是so+形容词+不定冠词+单数可数名词，如：It was so beautiful a book that every child likes it. ②在不可数名词前或可数名词复数前这时只能用such, 如：It is such good weather that we want to swim. 又如：They are such good students that they can pass the exam easily. ③在few, little， much, many 这4个字前只能用so而不能用such, 如：I have so much money that I can buy everything I want. ④当that前只有形容词或副词时，这时只能用so, 如：She is so beautiful that every one likes her. He ran so fast that I couldn't keep up with him.
［误］ He got up earlier this morning so as to that he could catch the first bus.
［正］ He got up earlier this morning so as to catch the first bus.
［正］ He got up so earlier that he could catch the first bus.
［析］ so…that与so that的用法有相同之处，那就是其后接从句，而so as to 其后要接不定式，即动词原形。这样的词组还有：in order to。
［误］ I want to buy same stamp that you have.
［正］ I want to buy the same stamp as you have.
［析］ the same…as (that)这是个固定用法，在same前的定冠词是不能少的。而the same…that意为"我要的就是那一个"。而the same…as为"要的是和……一样的东西"。
［误］ Before I do not give you the answer, I'll ask you some questions.
［正］ Before I give you the answer, I'll ask you some questions.
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