1）be good for：“对……有好处”。 如：Doing exercise is good for our health.

　　2）be good at：“擅长于……” 如：He is good at playing football.

　　3) be good to sb./sth： “对……好” 如：The old woman is good to us.

　　4) be good to do sth.： “适合；宜于” 如：The water is good to drink.

　　5) be good with： “与……相处好” 如： The teacher is good with his students.

　　四、原级、比较级、最高级的相互转换

　　1、原级与比较级的转换：比较级+than → not……as/so……as……

　　e.g. He speaks more loudly than me. → I don’t speak as/so loudly as he/him.

　　2、比较级与最高级的转换：the other +名（复）

　　在范围之内） the+最高级 → 比较级+than+ any other+名（单）

　　e.g. Jim is the tallest student in our class.

　　Jim is taller than any other student in our class.

　　Jim is taller than the other students in our class.

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