Teacher: So what do you know......... prepositions?

Student: Well I know that they usually come......... a noun.

Teacher: Very good. Which do you find the......... difficult?

Student: If I had to choose one, I would......... in.

Teacher: The thing to......... is that in usually means inside a place or a position.

Student: I see. But what's the difference ......... in and into?

Teacher: Ah, you see "in" means you are there inside ......... "into" means you enter as: You go into the room.

Student: Another problem is I don't understand ......... there are two words sounding the same — T and one O and T double O.

Teacher: Good question. T and one O is the preposition and T and double O often means extra as in: This exercise is too difficult. And don't forget the third word also sounding the same — the......... two.

Student: Oh, no two is......... thank you very much!