$#Cam$
` 37 ` : Is
` -> ` Learning English is interesting : Học Tiếng Anh rất thú vị
` 38 ` was driving
` -> ` Ta chia thfi QKTD : S + was / were + V-ing
-> ` While + S + was / were + V-ing , S + v-ed / v2
` 39 ` : haven't met
` -> ` Ta chia thì HTHT + since : S + have / has + VPII + since + 1 mốc TG / QKĐ
` -> ` DHNb ; since lats year
` 40 ` : will be doing
` -> ` Ta chia thì TLTD : S + will + be + V-ing