However, people aremore likelyto touch them.
这个句子是划分为 S-V-P-表语补足语 V 是are
还是划分为 s-v-o呢 V 是 are more likely to touch
be likely to最好不要拆分，可视为习语整体地当作助动词，后接动词原形一块构成句子的谓语（也有人称其为“复合谓语”）。正如如沐春风网友的贴图，夸克《英语语法大全》（P.193）将此类结构视为“半助动词”，因为贴图较模糊，现摘录如下：
半助动词：be going to等
3.14 半助动词包含一批动词习语，它们具备情态或体的意义，并由动词HAVE或BE引导；比如：
be able to; be bound to; be likely to; be supposed to; be about to; be due to; be meant to; be willing to; be apt to; be going to; be obliged to; have to
半助动词范畴的边界不清楚：可以扩大到把be unable to, be unwilling to等否定习语也包含进来。
……
...这类结构在一个方面比情态习语更接近主动词。它们有诸如been going to和to be bound to之类的非限定形式，因此可以与前面的助动词组合：
James will be obliged to resing.
We have always been willing to help.
两个或两个以上的半助动词甚至可以连续出现：
Someone is going to have to complain.
No one is likely to be able to recognize her.
......
