Did you see that car go past. It omits the subject you . Please pick up a gallon of milk at the store. Put a dime in the parking meter. With requirements and suggestions, the basic form of the verb is used.
Rules require that everyone be registered to vote.
The robber asked that John raise his hands. The children wished that the bowl had more ice cream in it. The bowl would hold more ice cream if it were bigger. With past statements contrary to fact, the past perfect tense of the verb is used. The bowl would hold more ice cream if it had been made bigger.