Have done
Indicates you not having a certain experience in the past
There are two alternate forms. The first form is a different way of saying (으)ㄴ 적이 있다/없다 and the second form is adding 아보다/어보다/해보다 giving it the feeling of 'have tried/have not tried'.
(으)ㄴ 일이 있다/없다
-(으)ㄴ 적이 없다 expresses not having a particular experience in the past and corresponds to 'have not done/had' in English. If the verb stem ends in a vowel, -ㄴ 적이 없다 is added, and if the verb stem ends in a consonant, 은 적이 없다 is added.
-(으)ㄴ 적이 있다 is commonly combined with -아/어 보다 to form -아/어 본 적이 있다, which means to have the experience of having tried something.
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