The verbs "has," "have," and "had" are all forms of the verb "have," which is used to indicate possession, an action that has been completed, or a state of being.
"Has" is the present tense form of "have." It is used to indicate that something belongs to someone or something, or to describe an action that is currently happening. For example:
- She has a new car. (She currently possesses a new car.)
- He has been working all day. (He is currently working.)
"Have" is the base form of the verb, and it can be used as both the present tense and the past tense, depending on the context. In the present tense, it is used in the same way as "has," to indicate possession or an action that is happening. In the past tense, it is used to describe an action that was completed at some point in the past. For example:
- I have a dog. (I currently possess a dog.)
- We have been waiting for hours. (We are currently waiting.)
- They had a party last night. (They completed the action of having a party at some point in the past.)
"Had" is the past participle form of "have," and it is used in the past tense to describe an action that was completed before another action in the past. It is also used to form the past perfect tense, which is used to describe an action that was completed before a specific point in the past. For example:
- I had finished my homework before I went to bed. (The action of finishing my homework was completed before the action of going to bed.)
- She had already eaten when I arrived. (The action of eating was completed before a specific point in the past, when I arrived.)
In summary, "has" is used in the present tense to indicate possession or an action that is happening, "have" is used in the present tense to indicate possession or an action that is happening, and in the past tense to describe an action that was completed at some point in the past, and "had" is used in the past tense to describe an action that was completed before another action in the past or to form the past perfect tense.