6. mai didn't go to the zoo with her friends last sunday because -> because of her sickness

7. if we would have -> had a large garden, we would plant a lot of flowers in it

8. nha trang, that -> which has a long beach, attracts many foreign visitors

9. a new department store was building -> built in our town last month

10. they used to having -> have big parties when they lived in the city

11. bỏ but nha

$6.$ Because `⇒` Because of her sickness

$-$ Because of + N

$7.$ We would have `⇒` We had 

$-$ Câu điều kiện loại 2 $:$

$+$ S + had + V3 / V-ed + O , S + would have + V_inf + O.

$+$ Diễn tả một sự việc không có thật ở hiện tại

$8.$ That `⇒` Which 

$-$ Dùng $which$ để chỉ một vật cụ thể

$9.$ Building `⇒` Built 

$-$ Thì QKĐ - DHNB $:$ last month

$10.$ Having `⇒` Have 

$-$ Used to + V_inf $:$ Từng làm gì đó

$11.$ Bỏ but

$-$ Trong câu không thể có hai liên từ