영어 문장 해석과 구조 설명 부탁드려요

아래 문장들의 해석과 문장 구조가 궁금해요.
1. “They are most terribly difficult, and the feeling one has is how little one can do towards their solutions.”
2. “It was a beautiful moonlight evening, and he sat watching the rising and falling spray of the fountain, and listening to its murmur.”
3. “His fear that things may go wrong has no foundation at all.”
설명 부탁드려요.