网友提供的句子是not only…but also连接两个“谓语动词+宾语”,第二个相同的谓语动词learn被省略了,仅保留了宾语some life skills。当not only…but (also) 连接两个相同的谓语而省略第二个时,就会出现连接两个不对称成分的情况。又如:
She not onlyplays the piano, but also (plays) the violin. 他不仅弹钢琴,而且还拉小提琴。
He not only goes to work on weekdays, but also (goes to work) on weekends. 他不仅工作日去上班,在周末也去上班。
▲如果两个宾语或状语共用一个谓语则可将not only…but also置于两宾语或两状语之前。如上面两句可改为:
She plays not only the piano but also the violin. 他不仅弹钢琴,而且还拉小提琴。
He goes to work not only on weekdays but also on weekends. 他不仅工作日去上班,在周末也去上班。