1: He doesn't play half as well as his sister does.
2: He doesn't play half as well as his sister.
In sentence one, the second "as" is a conjunction. Am I right? In sentence two, should I take the second "as" as a preposition or as a conjunction with "does" being omitted?
Thank you very much!
In both sentences, "as" is used as an adverb because it is comparing two things. It is used as a conjunction when something happening continuously over a period of time.
As he got worked harder, his grades improved.
That is an example of "as" as a conjunction. "As" is used as a preposition when referring to a characteristic something has.
They were treated as kings.
1: He doesn't play half as well as his sister does.
2: He doesn't play half as well as his sister.
In both the sentences the first as is an adverb, and the second as is a preposition.
A preposition can take a Noun Phrase (NP), or a clause or any other grammatical structure as its complement.
The word - half - before the first as is a determinative, that modifies - as well as his sister does.
A determinative can modify an adverb phrase -
I know I haven't done it that well.
In this sentence well is an adverb and it's being modified by the determinative - that.
1.As can be conjunction and a preposition depending on what it is connecting. If it is connecting a clause with another clause its a conjunction. for example: Choose your carrier as you wish. above sentence as is connecting a clause you subject and wish verb.
2.if as is use to connect a noun or phrase, then a preposition. for example, Chips was taken as a toddling child. in above as is a preposition as connecting a phrase.
The second 'as' of both sentences is conjunction since it is followed by a clause. Regarding the second sentence, you cannot compare 'play' with 'his sister'. They are not commensurable. So the 'does' is omitted.
