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greetings 6; 55	comparatives 1 ; 3 ; 19	directions 16	imperatives 16; 44
introductions 5	polite requests 24; 25; 30	third persons 1; 7; 11; 18	present continuous 3; 22; 45
going to (planned furure) 2; 21; 29	present perfect 2; 4; 6; 13; 33	past tense 13; 19; 27; 37; 47; 48; 50	past continuous 42; 48
present perfect continuous 44	present habitual 10; 14; 18	reported speech 22; 32; 39	modal verbs 13; 20; 21; 42; 52
adverbs of frequency 14