Modal verb sentence structure

Which is correct?

• Students can to reading this question.

• Students can to read this question.

• Students can reading this question.

• Students can read this question.

Which is the correct question form?

• Should he writes a preposition after a modal verb?

• Should he to writes a preposition after a modal verb?

• Should he write a preposition after a modal verb?

• Should he to write a preposition after a modal verb?

If Arsenal scores more goals than Chelsea, they will ______ the game.

What kind of word can come after a modal verb? (the others are impossible)

• verb 2

• adjective

• noun

• verb infinitive

Exception: Sometimes, we can put another kind of word between the modal verb and the infinitive verb. What kind of word is this?

• verb 1

• adverb

• verb 2

• preposition