go的所有变化形式（go的完整写法）

变化形式有过去式是went，过去分词是gone，现在分词是going，第三人称单数是goes，例如：

1.It was sad to see them go.看着他们离去，真让人难过。

2.He was sorry to see them go.看到他们离去，他十分难过。