weak的副詞形式是什么

　　weak句子示例

　　He became very weak towards the end of his life.

　　他臨終時很虛弱。

　　He was a weak little mouse of a man.

　　他是個懦弱無能的人。

　　I was always weak in the science subjects.

　　我總是學不好理科。

　　That bridge is too weak for heavy traffic.

　　那座橋不太牢固，承受不住過多的車輛。

　　The unions have always been weak in this industry.

　　在這個行業(yè)，工會一直沒有權(quán)威。