B2 First: using if and though

If and though are different.

I'll help you if you want. (if = it's a possible situation)
I'll help you though you don't want me to. (though = it's a fact. I know this)

If and even if are different.

I'll marry him if he is rich. (But not if he is poor!)
I'll marry him even if he is poor. (I'll marry him in any situation)

Though and even though are very similar. However even though is stronger - it adds emphasis.

I like dogs even though they are smelly.
I like dogs though they are smelly

 As if and as though are the same. We use them to mean "is like / is similar".

He looked as though he wanted to cry.
He looked as if he wanted to cry.

Practice: part 2 (open cloze)

Choose the best word (if, though, as or even) to complete these sentences.

  1. I'd never get married, even George Clooney asked me.
  2. He spoke to me if I was a servant.
  3. I didn't apologise, even I felt really guilty.
  4. I believed him, though he'd lied to me before.
  5. I would never take the job even they offered me ten times my current salary.
  6. He went out, though it was still raining.
  7. He'll help you though he's angry with you.
  8. He's so unfriendly - it's though he doesn't like me.
  9. Even it was expensive, he bought the car.