13: did you do$\\$ GT:$\\$ -> thì QKĐ nghi vân : did$\\$ s + V nguyên mẫu had gone -> thì QKH: s + had + VPII$\\$ 14: won't come$\\$ GT:$\\$ thì TLĐ : s +won^ prime t+V nguyên mẫu dấu hiệu nhận bt : tomorrow$\\$ 15: was watching$\\$ GT:$\\$ thì QKTD: s + was / were v - ing$\\$ 16: started - was$\\$ GT:$\\$ thì QKĐ : s + v-ed / v2$\\$ 17: were you doing - rang$\\$ GT:$\\$ thì QKTD; s + be + v - ing$\\$ 18: has driven - knew$\\$ GT:$\\$ thì HTHT+ since : s + have / has + VP||$\\$ + sinvce 1 mốc thời gian / thì QKĐ$\\$ dau since + thì QKĐ$\\$ 19: discovered$\\$ GT:$\\$ thì QKĐ$\\$ dấu hiệu : 400 years ago$\\$ 20: were playing$\\$ thì TD / s + be + V - ing$\\$ 21: joined_was GT:$\\$ 22: lost_was GT:$\\$ *Note: Hai câu cuối mình lười quá nên hông giải thích mong bạn thông cảm$\\$ #𝙃𝙏𝙝𝙪𝙮𝙨✿