$I$:
$34$. Did your father repair the bike yesterday ?
`->`Câu chủ động dạng câu hỏi Y/N thì QKD: Did + S + V-inf
$37$. If you study hard, you will pass your exam
`->`Câu đk loại 1: If + S + V(s/es), S + will/can + V
$36$. The girl who lived next door to us is very friendly
`->`who: mệnh đề quan hệ chỉ người
$37$. Ba said to Liz that he was going to meet his sister in front of the station
`->`Câu tường thuật trần thuật: S + said + ( to O ) + S + V(lùi thì)
$38$. Not until my mother told her had she known me.
`->`Not until: Mãi cho đến khi
`->`Not until + time word/ phrase/ clause + trợ động từ + S + V-inf
$II$:
$39$. I used to fly the kite when i was a small boy
`->`used to + V-inf: đã từng làm gì
`->`QKD + when + QKD: diễn tả 2 hành động xảy ra song song trong quá khứ.
$40$. At this time last week, we were collecting some garbage on the beach
`->`At this time last week: thời gian cụ thể trong QK`=>`Chia QKTD