都可以
hold on to do 和hold on to doing都对
hold on to do时看成 hold on + to do
hold on to doing的时候 看成 hold on to + doing
hold on自己就是词组了
那个歌词的确不能说明问题love也可以是名词
BR written The persistent Rudd led out and held on to go one up against Taylor in the semi-finals, but at 1-1 he left the door one at the 200-metre mark in the decider and Taylor accepted gratefully.
这个是collins wordbank里的原句.
是 ing形式
这里的 to 是介词
介词应该接 名词 代词 和 V+ing
楼主参考http://zhidao.baidu.com/question/49959193.html?si=1
此外,这个短语后面能加名词性短语吧,(n v-ing),参考
hold on
To maintain one's grip; cling.
抓住…不放;依附
To continue to do something; persist.
继续做某事;坚持
To wait for something wanted or requested, especially to keep a telephone connection open.
稍待:尤指不挂上电话以等待想要的或要求的事物
TO是介词既可加ING 又可加名词