She is always trying out new ideas ,为什么动词是ing形式?

She is always trying out new ideas ,为什么动词是ing形式? He is always(trying)out new ideas.为什么不是tries? is __the other children ,he is always trying out new ideas. Tom never gave up.he was()trying out new ideas 英语翻译They say trying is all that matters 中say后面加的是动词的ing形式?这是 She will be being well be+动词ing形式 这里的动词为什么是be? she always goes swimming （为什么swimming用ing形式） Edison always-----out new ideas when he was young She always has many new and good ideas是什么意思 I suppose they must be trying out new ideas in the lab的反义疑问句 I suppose they must be trying out new ideas in the lab,_____ where is she going?she后为什么用ing形式