| A | B |
|---|
| whether | if; to express doubt or a choice between two possibilities: He couldn't decide whether he should go or stay. It's doubtful whether there are any seats left. |
| though | although but used mainly in conversation; despite the fact that: I don't know if I want to go though. It's used at the end of a statement to make it less strong: |
| although | to show contrast or despite the fact: Although he wasn't tall, he was a great basketball player |
| however | but: He liked tea; however, he liked coffee better |
| than | to show comparison: Fahad is taller than Talal. |
| even though | despite the fact that; no matter whether: I'll get there even though I have to walk. |
| thus | therefore; so (formal): He is the oldest son; thus, he is heir to the throne. |
| while | used to contrast two things: While Fanta is good at math, Mariam is the better reader. |
