The imperative command ("Wait!") is a sentence. It is equivalent to "you should wait" or "you must wait". The subject (you) is understood, as in other forms of direct address.
It is a sentence. "Wait up" means wait for me.
i need to Wait
Im coming, Wait!
The verb in the sentence is "wait."
Example sentence - We will wait at the train station for the rest of our travel companions.
I can't see why you wait for her. If you wait for the train, it'll stop at this platform.
The word "Wait!" is an imperative sentence (you should wait!).The sentence "You left your purse" is a declarative sentence.There is no preposition anywhere in these.Perhaps the word sought was interjection, which "hey" would be, but not "wait."
Wait for me, I'm using the restroom.
Adverbs modify verbs the verb in this sentence is wait
Not to wait
I had to wait before the nurse was able to tell me my baby's weight.
you can not wait more time to lose weight