To such a great extent; used to emphasize the degree of something. adverb
She was so happy that she couldn't stop smiling.
The test was so difficult that many students couldn't finish it.
In the same way; similarly. adverb
Just as you have responsibilities, so do I.
He was late, and so was she.
For that reason; therefore. conjunction
It was raining, so we stayed indoors.
He didn't study, so he failed the exam.
Used to introduce a question or a statement that follows from something previously said. conjunction
So, what are we going to do now?
So, you think you can just walk in here and take over?
Used to show agreement or acceptance, often in response to a statement. adverb
'I think we should leave now.' 'So do I.'
'I can't believe he said that!' 'So what?'
Used to indicate the quality or condition of something. adjective
The food was so-so, nothing special.
His performance was just so-so.