to have learned 문장 설명 부탁드려요

다음 문장이 어떻게 같은 의미가 되는지 궁금해요.
I feel lucky that I learned how to swim when I was a child.
= I feel lucky to have learned how to swim when I was a child.
그리고 I seem to lose my sunglasses yesterday. 이 문장은 어디가 틀렸나요?