βꭺᗝᰔ﹏

`1`. My headphones don't work properly; therefore, I need to buy a new set.

`***` need to do sth (v): cần phải làm gì đó

`2`. The history test wasn't easy, therefore, we didn't have time to finish all the questions.

____________________________ _____________________________

`***` Therefore : Vì vậy

$-$ S $+$ V (any tense) $+$ therefore, $+$ S $+$ V (any tense)

`@` QKĐ:

$-$ S $+$ Ved/c2

$-$ S $+$ was/were $+$ O...

`@` HTĐ:

$-$ S $+$ Vinf/s,es

$-$ S $+$ did NOT $+$ Vinf..

$\color{#ffc0db}{\text{#}}$$\color{#ffdada}{\text{ᗩ}}$$\color{#ffdada}{\text{ꮮ}}$$\color{#ffebd6}{\text{ꮖ}}$$\color{#ffebd6}{\text{ꮑ}}$$\color{#fff7e1}{\text{ꭺ}}$$\color{#d6f9ff}{\text{ꭺ}}$$\color{#afeeee}{\text{ꭺ}}$$\color{#afeeee}{\text{ꭺ}}$⭐

1. My headphones don't work properly; Therefore, I need to buy a new set.

2. The history test wasn't easy; Therefore, we didn't have time to finish all the questions.

Clause ; Therefore + Clause: vì vậy 

`color{orange}{~MiaMB~}`