=would not;
例句:
I wouldn't call it a burden; I call it a responsibility.
我不觉得这是负担;我觉得它是一种责任。
You wouldn't leave an old friend in the lurch, surely?
你总不会对老朋友见死不救吧?
"Does it sound like music?" — "I wouldn't go that far."
“这听上去像音乐吗?”——“我可不那样认为。”