As you may know, have and has are both present forms of the verb to have and are employed with the verb have alone (for a present simple), with have/has (used as an auxiliary verb) and the past participle of another verb (for a present perfect) or with have/has (used as an auxiliary verb), the past participle of be and the past participle of another verb (for a present perfect continuous).

• Has is used with a third singular person ("he", "she", "it", or a noun) i.e. when the subject is singular but it's neither the person who's writing/speaking ("I") or the person who's reading/listening ("you");

• Have is used in any other case.

Here you will find the complete conjugation of the verb.

As you may know, have and has are both present forms of the verb to have and are employed with the verb have alone (for a present simple), with have/has (used as an auxiliary verb) and the past participle of another verb (for a present perfect) or with have/has (used as an auxiliary verb), the past participle of be and the past participle of another verb (for a present perfect continuous).

• Has is used with a third singular person ("he", "she", "it", or a noun) i.e. when the subject is singular but it's neither the person who's writing/speaking ("I") or the person who's reading/listening ("you"):

• He has just asked a question.

• Have is used in any other case:

• Can anyone tell me when we have to use "have", etc.

• I have just copied a sentence from your question.

• Have you noticed it?

Here you will find the complete conjugation of the verb.

As you may know, have and has are both present forms of the verb to have:

• Has is used with a third singular person ("he", "she", "it", or a noun) i.e. when the subject is singular but it's neither the person who's writing/speaking ("I") or the person who's reading/listening ("you");

• Have is used in any other case.

As you may know, have and has are both present forms of the verb to have and are employed with the verb have alone (for a present simple), with have/has (used as an auxiliary verb) and the past participle of another verb (for a present perfect) or with have/has (used as an auxiliary verb), the past participle of be and the past participle of another verb (for a present perfect continuous).

• Has is used with a third singular person ("he", "she", "it", or a noun) i.e. when the subject is singular but it's neither the person who's writing/speaking ("I") or the person who's reading/listening ("you");

• Have is used in any other case.

Here you will find the complete conjugation of the verb.