1. The game was boring to me.

2. He was bored with the game.
3. He saw the teacher boring the children.
4. He saw the students feel bored with the teacher.
5. He made the students bored with the teacher.
(Are they all grammatical?)

no

1. The game was boring for me.
2. He was bored by the game.
5. He was made bored by the teacher

Both you and "priyam" are correct about #s 1-4. In 1 and 2, either of those prepositions can be used.

I disagree with both of you about #5, though. If students are bored by the teacher, "He" didn't make that happen! The teacher did!!

#5 would be better written like this: The teacher bored the whole class.

Let's analyze each sentence to determine if it is grammatically correct:

1. The game was boring to me.
- This sentence is grammatically correct. "Boring" is used as an adjective to describe how the game made the speaker feel.

2. He was bored with the game.
- This sentence is grammatically correct. "Bored" is used as an adjective to describe how he felt about the game.

3. He saw the teacher boring the children.
- This sentence is grammatically incorrect. The verb "boring" should be replaced with a more suitable verb, such as "teaching" or "instructing."

4. He saw the students feel bored with the teacher.
- This sentence is grammatically incorrect. The verb "feel" should be replaced with a more suitable verb, such as "become" or "grow."

5. He made the students bored with the teacher.
- This sentence is grammatically correct. "Bored" is used as an adjective to describe how the students felt as a result of his actions.

To summarize, sentences 1, 2, and 5 are grammatically correct. Sentences 3 and 4 need slight revisions to be grammatically accurate.