How is the present perfect continuous tense formed?
A. The present perfect continuous tense is formed by using the auxiliary verb ‘do’, the main verb ‘be’ in its present participle form (-ing), and the main verb in its present participle form (-ing).
B. The present perfect continuous tense is formed by using the auxiliary verb ‘has’ (in present tense), the main verb ‘be’ in its present participle form (-ing), and the main verb in its present participle form (-ing).
C. The present perfect continuous tense is formed by using the auxiliary verb ‘have’ (in present tense), the main verb ‘be’ in its present participle form (-ing), and the main verb in its present participle form (-ing). For example, ‘I have been studying.’
D. The present perfect continuous tense is formed by using the auxiliary verb ‘will’ (in present tense), the main verb ‘be’ in its present participle form (-ing), and the main verb in its present participle form (-ing).
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Grammar › ViewChoose whether it is a simple, compound, or complex sentence.
In one mystery story, the villain insisted that he placed a key piece of paper between pages 47 and 48 of a book.
A. simple
B. compound
C. complex
Grammar › View
Mrs. Crown ________ her class about progressive verb tenses last week.
A. teaching
B. is teaching
C. was teaching
D. will be teaching