Grammar Lessons 69 and 70

Complexity: Hard

Features: (1) More about the present perfect form (2) finished and unfinished time (3) special use for the words ‘want’ and ‘need’ (4) using ‘both’, ‘all’, ‘together’ and ‘but’ (5) short questions and short answers. New words and phrases: niece, couple, assistant, laundry, stockings, aspirin, penicillin, interested.