Verify mobile number to view the solution
Solutions
"Has" can be used in two ways. One when it is used to show the possession for something, like in 'he has a car'. In the given sentence "has" cannot be used in this sense in the sentence as "regrets" are not any physical thing which one can possess. The other way, one can use "has" is in the present perfect tense. In this tense, "has" will require the main verb in the third form. The sentence does not have the main verb which makes it incorrect. So, the use of "had" is mandatory here which acts as the main verb. Sinc the sentence talks about the past experiences "had" is correct.