1. Thirteen years old Ronnie Segal has loved Math since he was a little boy.

→ Cấu trúc: Chúng ta sử dụng Since khi nói đến thời gian cụ thể mà hành động, sự kiện đó bắt đầu, trả lời cho câu hỏi hành động, sự kiện đó bắt đầu khi nào (When?) Cấu trúcngữ pháp: -Since + thời điểm trong quá khứ (since 1990, since 80s,…) -Since + simple past (since I was a child,…)

2. Martina's mother has been her coach for many years.

3. Her grandfather’s illness was _______ we thought at first. 
as serious than
as seriously as
more seriously as
more serious than
Giải thích
Cấu trúc: S1+ to be+ more long-adj/ short-adj_er+ than+ S2/Clause/ any other...
Đáp án
4. You must explain your problems ________.
as clear as you can
as clearly as you can
as clear than you are
as clearly as you are
Giải thích:

Cấu trúc:
S + tobe + as + adj + á +o/s +tobe

S + V + as + adv + as + o/s + Trợ động từ

Câu đề là dùng must explain -> V thường >>> dùng với cấu trúc

Thirteen-year-old Ronnie Segal has loved Math __since___ he was a little boy.

Martina's mother has been her coach _as__ many years.

Her grandfather’s illness was __more seriously as ___ we thought at first. 

You must explain your problems __as clear as you can__.