PRESENT PERFECT CONTINUOUS

present perfect continuous or simple choose

present perfect exam ( ever, never...)

complete with present perfect simple or continuous

explicación y ejercicios, BRITISH COUNCIL ADOLESCENTES
simple or continuous choose
EXPLICACIÓN Y EJERCICIOS
Present perfect simple or continuous complete
complete
present perfect continuous complete afirmative or netagive
present perfect continuous interrogative
complete simple or continuous
otro...    otro....
otro....