Where do the punctuations go in this sentence? "I have taken notes on your book however i still have questions."

Here is the correct punctuation of the given sentence : I have taken notes on your book; however, i still have questions.". The word 'however' is a conjunctive adverb that is needed to connect two independent clauses into a compound sentence. As a rule, semicolon always precedes the conjunctive adverb so do not confuse it with one more comma before a conjunctive adverb.