120 Rules of Grammer

RULE27: The use of
Conjunction “although” :

“Although”, meaning “in spite of something”, is a subordinating conjunction.
This means that the clause which it introduces is a subordinate clause, which needs a main clause to make it complete.

Sometimes “although” as a subordinate clause may take “yet” in the main clause.
However, “although” as a subordinate clause never takes “but” in the main clause.[Yet is optional. It can or cannot be used.]

Examples:-

🟠Although she is rich, she thinks twice before spending a penny. ✅

🟢Although she is rich, yet she thinks twice before spending a penny. ✅

🟠Although she is rich, but she thinks twice before spending a penny. ❌