`4` She has not written t her mother in New York for a long time 

`=>` It has been + time + since + S + Ved / V2 + O

`=` S + hasn't / haven't + Vpp + for + time 

`5` Lan speaks English more fluently than me 

`=>` Câu so sánh hơn với trạng từ : 

`-` S1 + V + adv er / more + adv + than + S2 

`6`  Because the storm was severe , their vacation was put off 

`=>` Because of + N / N phrase / Ving 

`=` Because + S + V+ O : Bởi vì

$\text{4.}$ She has not written to her mother in New York for a long time . 

→ It's +has been + time  + since + S + Ved/cột 2 + O 

→ S + hasn't/haven't + Vpp + for/since + time 

$\text{5.}$ Lan speaks English more fluently than me . 

→ S + be/V + adv thêm er hoặc more + adv + than + N/pronoun 

$\text{6.}$ Because the storm was severe , their vacation was put off . 

→ Because of + Noun/Noun Phrase/V-ing , clause 

→ Because + clause 1 , clause 2 

$\Rightarrow$ Mệnh đề chỉ lí do 

$#Keisha$