Introduction:

There is no magic to learning prepositions. Unfortunately, they have to be memorized.

Structure:

Remember, these are not phrasal verbs but general prepositions.
Also remember sometimes you can have two solutions.
e.g. on the train / in the train

Examples:

I was on a boat last week.
I was in the car when you saw me.
Where you at the office last week?
Where you in the train? Were you on the train?