whom (pron) 谁

‘whom’ is used to connect the main clause with the attributive clause and serves as the object in an attributive clause.

He is the teacher whom I met yesterday.
This is the girl whom I visit every weekend.

vile (adj) 卑鄙的
He is vile. Subj+verb(linking)+adj
They are very vile.
In the game, he was vile.

Good!

I ate lunch.
I played four-square.
I had eaten lunch before I played four-square.

‘four-square’ is an adj.
You can write Foursquare referring to the computer game.
When referring to a proper noun, the first letter should be capitalized.

I read book.
I wrote homework.
I had written homework before I read book.

The same problem!
Please add an article before a singular countable noun.
The article refers to a or an or the.
You should say ‘I read a book’ here.

And we always say ‘I write my homework’.
You should make it clear that whose homework it is.

I read a book.
I wrote my homework.
I had written my homework before I read a book.