什么时候用副词?什么时候用形容词?

形容词一般修饰名词和代词。
【例】She is a beautiful girl. beautiful是形容词。

副词一般修饰动词。
【例】I put up my hand quickly. quickly是副词。

【一般规则】形容词+ly＝副词
【其它】形容词以y结尾的，形容词是闭音节的有特殊变化。

Today is cloudy.

This cat is very cute.

I write very tired.

修饰名词用形容词。
This book is good.这本书很好。（修饰名词书所以用形容词good）
修饰形容词，动词，其它副词及句子用副词。
He draws well. 他画画很好。（修饰动词画画所以用副词well）
形容词变副词一般加ly。
quick--quickly careful--carefully

It's cloudy today.
This cat is lovely.
I'm tired by writing.

副词用来修饰动词，如run quickly ,dig deeply......
形容词用来修饰名词，如:red apple ,beautiful songs......
或者用来做表语：I'm fine.
一般加ly
today is cloudy
this is a lovely cat
I 'm tired to write

副词修饰形容词.形容词修饰名词
加ly是规律
today is windy
this cat is lovely
i write tiredly
注意lovely是形容词不是副词

副词修饰动词，形容词修饰名词。
She speaks slowly.
She is a slow talker.

It's clody today.
This cat is very cute.
Writing makes me tired.