`Very quickly indeed' is an adverbial phrase. very quickly indeed 是状语短语.
How do you think of the second adverbial clause? 你怎么理解第二个状语从句?
The prepositional phrase used as an adverbial is usually before a verb. 介词结构一般放在动词前作状语。
adverbial
[ noun ]
a word or group of words function as an adverb
<noun.communication> [ adj ]
of or relating to or functioning as an adverb
<adj.pert> adverbial syntax
Adverbial \Ad*ver"bi*al\, a. [L. adverbialis: cf. F. adverbial.] Of or pertaining to an adverb; of the nature of an adverb; as, an adverbial phrase or form.