Modal Forms

Modal verbs can be used in a variety of different forms. Study the examples below.

Modal Simple
I could swim at the beach.

Passive Modal Simple
The room should be cleaned once a day.

Modal Continuous
I could be swimming at the beach right now.

Passive Modal Continuous
The room should be being cleaned now.

Modal Perfect
I could have swum at the beach yesterday.

Passive Modal Perfect
The room should have been cleaned yesterday.

Modal Perfect Continuous
I could have been swimming at the beach instead of working in the office.

Passive Modal Perfect Continuous
The room should have been being cleaned but nobody was there. (Rare form)