appear to do

appear to be：好像是,仿佛；强调状态
appear to do：好像做了某事；强调做了.事
如果后面不是"flattering"而是"flat"就用"appear to",因为"flat"就是do的形式了.

扩展阅读：judge by appearances ... appear to be doing ... appear from nowhere ... appear to be submissive ... appear to have done ... appeal to common sense ... advisable for sb to do ... seem to do ... appeal to sb to do ...