I'm delighted to see that Jerry provided the correct words. Roberta Flack, when she popularized the song, changed the word "thought" in the third verse to the word "knew"; a change that completely changed and entirely corrupted the meaning of the song for me.
When McColl/Seeger came through this part of Oregon back in the early '80s I requested the song, and Ewan seemed surprised that anyone would still associate it with them/him, but he sang it, and it was lovely.
Blessings,
Barbara