6 . phones ( HTD - usually - S là số ít - V thêm s/es ) / didn't phone ( QKD - yes terday - Câu phủ điịnh - didn't - V nguyên )
7. went ( QKD - last night - V2 ) / didn't enjoy
8. saw ( QKD ) / were stopping ( QKTD - hđ xảy ra ngay lúc ns trong QKD )
9. have saw / was trying
10. is trying ( HTTD - at the moment - S là số ít - is - Ving )
11. was living ( QKTD ) / met – was working ( QK - while - chia ở dang TD )
12. were you doing ( QKTD - at 10 o'clock yesterday - S là you - câu hỏi - đảo were lên đầu - Ving ) / Were you studying