Singular present perfect progressive - Both dogs have been barking for hours.Singular present perfect progressive - The dog has been barking for hours.Plural present perfect - Her friends have graduated from college.Singular present perfect - She has graduated from college.In the present perfect tense and the present perfect progressive tense, the verb 'to have' must match the singular or plural subject: Plural past progressive - The cars were working yesterday.

Singular past progressive - The car was working yesterday.

Plural present progressive - His brothers are running in a marathon.

Singular present progressive - Peter is running in a marathon.

For example, in the progressive tenses, the verb 'to be' changes with the subject:

When you're writing in the progressive or perfect tenses, the main verb doesn't change with singular or plural subjects - but the linking verb does. Plural irregular - They sold my motorcycle.Singular irregular - He sold my motorcycle.Plural irregular - We came to the party.Singular irregular - She came to the party.Plural regular - Dave and Miles played football.Singular regular - Dave played football.Plural regular - The neighbors helped me.

Regular past tense verbs (and most irregular past tense verbs) are the same for both singular and plural subjects. Deciding whether a verb is plural or singular mostly happens when you're writing in the present tense.

What is the verb