A verb usually says something about someone or something. All of the example sentences above say something about John. "John" is the **subject** of those sentences. In English the subject usually comes before the verb.
Sometimes there is another person or thing associated with the verb. In the examples below, the underlined word is the verb, and the phrase in bold print is the **object**. In English the object usually comes after the verb.
In some languages, a verb that needs an object must always take one, even if the object is not very important. People who speak those languages might say the sentences above like this.
In some languages, the verb may be a little bit different depending on the persons or things associated with it. For example, English speakers sometimes put "s" at the end of the verb when the subject is just one person. In other languages marking on the verb may show whether the subject is "I," "you," or "he"; singular, dual, or plural; male or female, or human or non-human.
When we tell about an event, we usually tell whether it is in the past, the present, or the future. Sometimes we do this with words like "yesterday," "now," or "tomorrow."
In some languages the verb may be a little bit different depending on the time associated with it. This kind of marking on a verb is called **tense**. English speakers sometimes put "ed" at the end of the verb when the event happened in the past.
In some languages speakers might add a word to tell something about the time. English speakers use the word "will" when the verb refers to something in the future.
When we tell about an event, sometimes we want to show how the event progressed over a period of time, or how the event relates to another event. This is **aspect**. English speakers sometimes use the verbs "is" or "has" and add "s," "ing," or "ed" to the end of the verb in order to show how the event relates to another event or to the present time.
* While Mary <u>was cooking</u> the meat, John came home. (This tells about something Mary was in the process of doing when John came home)
* Mary <u>has cooked</u> the meat, and she wants us to come eat it. (This tells about something Mary did that is still relevant now.)
* Mary <u>had cooked</u> the meat by the time Mark came home. (This tells about something that Mary completed in the past before something else happened.)
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