It is considered unfriendly not to smileIt is best not to touch unless you are sure the other person is comfortable with it.这两句里的not to smile,not to touch视作定语还是状语,如果是状语,是充当什么状语?
...use of to combine two nouns, or a noun and a present participle, when the second noun or present participle defines or gives more information about the first noun. 用以连接2个名词或1个名词和1个现在分词,其中第2个名词或现在分词限定第1个名词或给出有关...
Rosenberg argues convincingly that public-health advocates ought to take
a page from advertisers, so skilled at applying peer pressure. 粗体的是做什么成分呢?是做advertisers的非限定性定语吗?
…allow state media to show domestic audience the world's press, hands aloft and clamouring to join this simulacrum of democracy. 这里的hands aloft and clamouring to join this simulacrum 是独立主格加分词状语吗?还能这么用!?