+0
What is the difference in usage between therefore and so?
+0
In the case where so means therefore, the only difference is register: therefore is more formal.
so is used in other cases with other meanings, of course, but I don't think you were asking about those.

CJ
+0
Hi,

If you are comparing these two, you are probably thinking about conjunctions.

'So' is a conjunction. He loved her, so he married her.

'Therefore' is not classed as a conjunction, strictly speaking, although it is often used as one.

He loved her. Therefore, he married her.

He loved her, and therefore he married her.

(Descartes did not use the English word 'therefore' when he said the much-quoted 'I think, therefore I am'. He said 'Je pense, donc je suis', and 'donc' is considered a conjunction in French.)

Best wishes, Clive
Students: We have free audio pronunciation exercises.
Comments  
CliveHi,

If you are comparing these two, you are probably thinking about conjunctions.

'So' is a conjunction. He loved her, so he married her.

'Therefore' is not classed as a conjunction, strictly speaking, although it is often used as one.

He loved her. Therefore, he married her.

He loved her, and therefore he married her.

(Descartes did not use the English word 'therefore' when he said the much-quoted 'I think, therefore I am'. He said 'Je pense, donc je suis', and 'donc' is considered a conjunction in French.)

Best wishes, Clive
That's what I was trying to know. Thanks, Clive.
Teachers: We supply a list of EFL job vacancies