Grammar

  

Conjunctions

One long-running debate regarding conjunctions is the use of words like and, but and or at the beginning of a sentence. Bernstein has this conclusion for us:

Sentences beginning with "and", "but", or "or" are acceptable provided the practice is not overdone. Indeed, nothing that is overdone is ever acceptable, be it language or lamb chops.

—Theodore M. Bernstein

One very common error with the usage of the conjunctions although and but is illustrated below:

Although/But

Although these products are expensive but retailers have no problem selling them.
Although these products are expensive, retailers have no problem selling them.
These products are expensive but retailers have no problem selling them.
Although these products are expensive, yet retailers have no problem selling them.