Past Perfect Continuous Tense represents an action that started, continued and ended after some time in the past.

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Past Perfect Continuous Tense represents an action that started, continued and ended after some time in the past.
Simple Present tense is used when, the action is simply mentioned and there is nothing being said about its completeness. Get uses and exam
Tense table: Find affirmative, negative and interrogative examples of present, past, future and conditional tense with simple, continuous, p