請問sb spent three days on N/in ving SVO後面的on N/in Ving是作為副詞用的介係詞片語嗎?

要學好英文一定要養成常查字典的習慣,時間久了，反覆查過的生字(包括例句和不同用法)就會慢慢植入你的記憶中，成為你知識一部份。

在牛津詞典中，查找動詞“spend"，你會發現，就 "使用時間" 的含義而言(to use time for a particular purpose)，有以下幾種用法：
1- spend something + adv./prep.
2- spend something on something
3- spend something doing something
4- spend something in doing something

"spend" 在這裡是一個及物動詞，something 是它的受詞(直接賓語)，一般是有關時間的名詞，接後就是副詞性質的短語 (including prepositional phrases and participle phrases)，說明目的。

Spend 是不及物動詞，與介詞on連用，形成及物動詞，而in+ ving形成介詞片語，當副詞修飾動詞spend，也有可能是當形容詞修飾其前邏輯主詞，例The girl in red shirt is my sister.

In this pattern the verb is followed by a direct object and a preposition and its object.
Sb spent-----Subject+v
3 days------DO
on------preposition
sleeping-testing------object
Now the object may be a noun phrase
=sleep through testing
=not to be woken up by a clinic machine noise;
However, the prepositional phrase(介係詞後的名詞可以不抽象) is variable, eg:-
spend 3 days on electronic oscilloscope-------prepositional phrase
spent 3 days under the (sleeping tunnel);eg:-
spent 3 days in the (exhausing body-pump);eg:-
spend in doing sth in explaining a clinic plan in all his energy---adv phrase.

Somebody have spent three days on studying in writing. Yip