Adverbs answer questions such as these:How?When?Where?Why?To what extent or degree?These words，most of which end in-ly，modify verbs，adjectives，other adverbs，and infinitives，gerunds，and participles．

副词在句中属修饰成分，通常以-ly结尾，可以修饰动词、形容词、其他副词以及不定式、动名词和分词等。

The negotiations ended abruptly．

The price of raw materials is unusually high this year．

This machine operates very efficiently．

Applied properly，the paint will cover most surfaces satisfactorily．