【英语】【翻译】关于go：

又有人敲门。我去开门。 There's another knock. I'll go and answer the door.
我爷爷叫我去开门。My grandpa told me to open the door.
我去开。I will answer it.
"爸，开门！让我进来，我回来啦！""Father! Open up! Let me in, I'm home."
Come and see me,Go and look at it等句子结构中，and表达的意思是“Come以see me做目的，Go以look at it 做目的”，不是并列关系存在，常出现在口语中。要注意的是这种结构只适用于现在时态和不定式里，不能用在过去时态、分词或动名词中。

为您解答
一，是的，go doing一般都是指运动类的活动。

Use go for sports that end in –ing

skiing
swimming
climbing
diving
fishing
running
jogging
skating / figure skating
golfing*

*Yes, you can play golf and go golfing. Golf is also a verb.

二，go open the door可以，但只是限于美式英语的口语。其实是不合乎正统语法的，书面不可用。

就是“出去”的意思 go out there and fight 习惯用法: 去打拼，去努力 I need to go out there and fight everyday 每一天我都必须要去努力奋斗