Question

useful use used 这3个单词有什么区别啊

Answer 1

1.useful 形容词,有用的,如：This book is very useful.这本书很有用.

2.use 动词,使用,如:He used a knife to cut the apple.他用刀把苹果切了.

3.used 即是动词use的过去式,过去分词,又是形容词,习惯的.如：I am not used to getting up early.我不习惯于早起.