英语中副词修饰动词时,是放在动词前还是后?

英语中的副词可以修饰动词,形容词或者是副词
副词用来修饰动词时要放在动词的后面,如果动词带有宾语要放在宾语的后面
He looked carefully
He did his homework carefully
副词修饰形容词副词时放在形容词副词时放在其前面
She is very beautiful
She runs very fast