Whom did you see is correct, and is required in writing. In speech, people generally say "Who did you see?"
'You see the sadness in my eyes.' is grammatically correct: Subject: you Verb: see Article: the Direct object: sadness Preposition: in Possessive adjective: my Object of the preposition: eyes
It depends on the context. "He saw" is the correct past tense form, while "he see" is not grammatically correct in standard English.
The infinitive should be used. "Planning to see" is correct.
Yes, it's fine.
The sentence given is grammatically correct. The verb in in its imperative mood and therefore does not need an explicit subject; the subject "you" is presumed.
No, I think the correct way is- Is this the first time you've seen it?
It all depends on the context surrounding it, but in and of itself "please see attached letter" is correct.
no. you should say like you and i No, this answer is incorrect. The rule has to do with whether it is subject or object, but, put simply, you should just remove the "you and" and see if you could say it. You can't say "like I" - therefore you can't say "like you and I" - It has to be "like you and me." You can say things like "you and I are going to the park" because you can say "I am going to the park" but you wouldn't say "me am going to the park." But you can't say "he is coming to the park with you and I" - using the same principle as above.
The phrase "made you" can occur in a grammatically correct sentence, yes. We'd have to see the entire sentence to know for sure.
I don't see a problem with it, but 'extremely difficult to find' is better.
Almost but not quite. The grammatically correct wording is "Please see the attached agenda." As a shorthand, you could also say "Please see agenda (attached)."
Unfortunately no. The correct phrase is "I will see you tomorrow." Alternately, you could say either "I will see you Monday", or "I will see you on Monday" -- with the proper noun "Monday", either is correct. "Tomorrow", however, is not a proper noun and thus "on" must be omitted.