Rules of Past Perfect Continuous Tense

The past perfect continuous tense is used to describe...

Rules of Past Perfect Tense

The Past Perfect tense is used to talk about an action that happened...

Rules of Present Perfect Tense

Present Perfect tense is used to talk about actions or events...

Rules of Future Perfect Tense

The Future Perfect tense is used to talk about an action that...

A need is something that is necessary to live and function.

A want is something that can improve...