英语中，什么情况下使用副词，什么情况下用形容词？

副词的种类:
1.一般副词主要分为以下几种:
①.时间副词, 如: often, always, early, now
②.地点副词, 如: here, there, above, outside
③.方式副词, 如: hard, well, badly, fast, slowly
④.程度副词, 如: very, quite, much, still, almost
2.疑问副词(放在特殊疑问句的句首), 如: how, when, where, why
3.关系副词(放在定语从句句首), 如: when, where, why
4.连接副词(放在名词从句句首), 如: how, when, where, why, whether
二.副词在句中的作用: 副词修饰动词, 形容词, 名词, 副词或全句, 在句中的作用如下
1.作状语:
a. You should always review your lessons.
b. The visitors are warmly welcomed by the students.
c. Certainly we should try out best to improve our work.
2.作表语:
a. He is abroad.
b. The class is over.
c. The football match is on.
3.作定语: 副词作定语时置于被修饰词之后
a. This is her first day up.
b. The comrades here give us a lot of help.
4.作补语(包括宾语补足语和主语补足语):
a. I found all the lights on when I got home last night.
三.副词在句中的位置:
1.时间副词和地点副词的位置:
①.表示确定时间的副词和表示地点的副词一般放在句尾. 若句中同时有地点副词和时间副词, 地