關於"All you can do is listen to the radio and smoke too much.

題目：

關於"All you can do is listen to the radio and smoke too much."中:
爲什麼是"listen",而不是"listening"或者是"to listen".

解答：

1）英語語法規定：如果用不定式結構做句子表語,且其前有行爲動詞do或其變化形式did/does/done的時候,這時必須省略不定式符合to.
這一規定簡而言之即是：前有do,後無to.
此語法現象比較常見,也是考試中經常考查內容.
2）再如：What I can do now is (to) wait here.
All you need to do is (to) fill in the form.
3）二樓也很細心：不定式並列時,一般第二個to也會省略,即and smoke too much = and (to) smoke too much.