Translates to may, might or does.

For example: I may know what you saw.

Ambulo, Ambulare, Ambulavi, Ambulatus: You take the Present Infinitive (Ambulare), remove the "-re" at the end, and replace the last vowel with a conjugation (see chart below). In this case Ambula is a 1st conjugation, so it would become Ambule. Then add the appropriate ending. Ambulet would mean "He might walk" and Ambuletur would mean "he is (being) walked."