The common nouns are:
The common nouns in the sentence are: people, platform, train.
Yes, the noun 'people' is a common noun, a general word for two or more human beings.The common noun 'people' is capitalized in the example sentence because it is the first word in the sentence.
The exprees train arrived early and waited on the platform. Express yourself clearly when you speak in public.
There is no preposition in that sentence. I is a pronoun, waited is a verb, and outside is an adverb.
Waited
It is an adverb qualifying the verb waited.
The simple subject is "You" and the simple predicate is "waited."
i waited in an anteroom
for
I found I had waited to no avail. As the patient feral cat waited for a passing mouse, he seemed frozen in place prior to his pounce. I waited and waited for for my waiter, but I just had to get out of my waders.
Example sentence - We waited for her to confess to the lies she told.
They did not wait for us.