Question

How do you correctly punctuate this sentence? According to my dentist I need to brush my teeth for at least two minutes

Answer 1

Answer:

According to my dentist, (comma) I need to brush my teeth for at least two minutes. (period)

Explanation:

Answer 2

Answer:

Place a comma after the word 'dentist,' (( and put a period after the word 'minutes.' ))

Explanation:

Why? ... because you have to separate the dependent (subordinating) clause from the independent clause -- whenever it begins the sentence.