so far
does thus far and so far have the same meaning?which one is more common?

should I use both of the two phrases above with present perfect?

eg: I have completed part of my homeowrk thus far/so far.

Thank you!

Question

so far
does thus far and so far have the same meaning?which one is more common?

should I use both of the two phrases above with present perfect?

eg: I have completed part of my homeowrk thus far/so far.

Thank you!

Answer

They mean the same thing and can be used interchangeably. "Thus far" is a little more formal, so "so far" would usually be more common.

They are properly used with a more definite idea. For example, "I've finished about half my homework so far." (Not just "some.")