Extra grammar exercises

Click here to check your answers to the exercises from the photocopies I gave you in class (unit 16: Present Perfect Continuous; unit 17: Present Perfect Continuous or simple?; unit 121: for, since, ago and before)

Present Perfect Continuous

Remember that: ♦ in the same way that there is a ‘simple’ and a ‘continuous’ form of the present and the past, there are also two forms of the present perfect (simple and continuous). ♦ the most important difference between the two forms is that with How long…? and for / since we normally use [...]