$#hmmmmm$
` 1 ` was reading
` -> ` Thì QKTD : S + was / were + V-ing
` -> ` QKTD + while + QKTD
` 2 ` : has worked - moved
` -> ` Vế has worked ta chia thì HTHT + since : S + have / has + VPII + since + mốc TG / QKĐ
` -> ` vế moved t áp dụng cấu trúc trước since chia thì HTHT sau since chia thì QKĐ
` 3 ` ate
` -> ` QKĐ + after + HTHT
` -> ` QKĐ : S + v-ed / v2
` 4 ` had studied
` -> ` Ta chia thì QKHT : S+ had + VPII