Exercise 9.4
Unit 9 - Present perfect continuous·English Grammar in Use
Pregunta
Put the verb into the present continuous (am/is/are + -ing) or present perfect continuous (have/has been + -ing).
Unit 9 - Present perfect continuous·English Grammar in Use
Pregunta
Put the verb into the present continuous (am/is/are + -ing) or present perfect continuous (have/has been + -ing).