This is a rule that the subject and verb must be the same in number. This is a word that denotes action, occurrence or existence. This indicates the time of the action or state of being. This relates to the principal parts of words that show action or states of being. This is the form a verb takes when it expresses an action in later time; helping verbs (will and shall) accompany the main verb. This is a word that connects the subject to either a noun or adjective. They are either a form of "be" or other specific words. This is the form a verb takes when it expresses an action that has already occurred; regular ones are formed by adding d or ed to the basic verb form. This is the form a verb takes when it expresses current action. In the third person singular (he, she, it), often add an s or es to the basic form of the verb. This is the tense formed by the use of "have" or "had", and indicate completed action. These are verbs that do not follow standard conjugation rules. This is a verb that conveys action that has an object. This is a verb that conveys action that has no object.