Present simple or present continuous? - English Grammar Today - a reference to written and spoken English grammar and usage - Cambridge Dictionary
Future Perfect Continuous Tense. In Future perfect continuous tense first form of the verb is used with the addition of ing ( 1 st form + ing). “ (will have been, shall have been)” is the helping verb of this tense. Since and for phrases are also used at the end. Table of Contents.
Future perfect continuous ( I will have been working here ten years ) - English Grammar Today - a reference to written and spoken English grammar and usage - Cambridge Dictionary ryCl6.