来自成安生的问题
needdoing和needtodo的用法.不要复制的.
needdoing和needtodo的用法.不要复制的.
![](/static/mobile/images/message.png)
![](/static/mobile/images/time.png)
needdoing和needtodo的用法.不要复制的.
needdoing和needtodo的用法.不要复制的.
needdoing表被动
如theflowerneedswatering
needtodo需要做(主动)
weneedtofinishhomeworkontime