表示主动关系的时候,用 ing形式:
如:Hearing the noise from the next room ,the baby opens his eyes.
表示目的的时候,用 to + 动词原形 :
如:To solve this problem ,he spends two hours on it .
表示主动关系的时候,用 ing形式:
如:Hearing the noise from the next room ,the baby opens his eyes.
表示目的的时候,用 to + 动词原形 :
如:To solve this problem ,he spends two hours on it .