there are some verbs that are singular with the "s" at the end and plural without the "s". FOR EXAMPLE: contribute (that is plural) but contributes is singular. that is extremely confusing so can you please list a few verbs for me?
ALSO, when do i use can and could? i feel like i can use either no matter what the situation
ALSO, when do i use can and could? i feel like i can use either no matter what the situation