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Practise with a grammar game

When we want to speak about something that will have been completed or done by a particular time in the future, we use the future perfect simple tense.

			Next January we'll have been here for 12 years.
			I'll have finished my homework by dinner time.

If we want to stress the continuity of the future event, we use the future perfect continuous tense.

			Jack will have been working as a policeman for fifteen years next month.
			I'll have been doing this project for a month next Monday.

For more information on the future perfect simple and continuous forms, see the following web sites:

http://www.edufind.com/english/grammar/Tenses19.cfm

http://www.edufind.com/english/grammar/Tenses20.cfm