I am the first to admit that I don't know all the right terms for parts of grammar (GCSE English did away with all that!) so am not sure if this is something to do with transitive and intransitive verbs ... but surely these phrases are missing some vital words like "about" or "at"?
Sorry if this has already been done here, I imagine it has but couldn't see a likely looking thread.
If anyone can enlighten me about the grammatical rules these phrases break, that would be appreciated!