I/

 1.My friend studying Japanese before her moving to Japan.

 2.I don't know when the train leaves.

II/

 1.The win started has blown for three hours.

 2. Because leaves are damaged, the tree cannot get enough food energy to stay healthy.

 3. Although my grandfather is very old, he is still young at heart.

 4.Despite the heavily rain , we went to school on time 

Đáp án + Giải thích bước giải:

I.

1. My friend studying Japanese before her moving to Japan

→ HTĐ+ before + HTĐ: trước khi thực hiện hành động này sẽ thực hiện hành động khác

 2.I don't know when the train leaves.

→ HTĐ + when + HTĐ: diễn tả mối quan hệ giữa hành động của hiện tại và kết quả trong tương lai

II.

1.The win started has blown for three hours.

→ thì HTHT: S + has/have + V3/ed + ...

2. Because leaves are damaged, the tree cannot get enough food energy to stay healthy

→ Because + S + V, S + V,...

→ Nguyên nhân - kết quả

3. Although my grandfather is very old, he is still young at heart

→ Although + S + V(tobe) + adj,...

4. Despite the heavily rain, we went to school on time 

→ Despite/In spite of + V-ing/cụm danh từ + ...

→ Khác chủ từ → dùng cụm danh từ