36. Which of these present perfect continuous questions is formed correctly?
37. Which of these uses is NOT a use of the present perfect continuous?
38. We often use ‘for’ and ‘since’ with the present perfect continuous.
39. Complete the sentence by choosing the correct form of the verb in the present perfect continuous.
40. Complete the sentence by choosing the correct form of the verb in the present perfect continuous.
41. Complete the sentence by choosing the correct form of the verb in the present perfect continuous.
42. Complete the sentence by choosing the correct form of the verb in the present perfect continuous.
43. Complete the sentence by choosing the correct form of the verb in the present perfect continuous.