Cause / Reason

As

As I was in a hurry, I did not take my breakfast.

because

John was angry because I forgot to invite him.

since

I stop playing football since I sprained my ankle.

Concession

although

Although Mary was sad, she did not cry.

even if

I would not go even if it is nearby.

Though

Though I was tired, I could not sleep.

whether .. or

Joe is telling the truth whether you believe it or not.

Condition

Except that

Except that he is forgetful, he works well.

if

Study hard if you wish to pass the test.

unless

John will not do anything unless you asked him to.

Manner / Degree

as if

He speaks as if he knows everything.

as though

Charlie ate as though he had not eaten for months.

than

Joe is smarter than I am.

so that

I called him so that he would remember.

that

The lecture was so boring that I fell asleep.