... humans.-The adjective “harmful” is followed by the preposition “to”.-Many adjectives are used with particular prepositions and these must be learned by heart. “in” following such adjectives ... không?)*He was sad about his failure.(Ông ta buồn về sự thất bại của mình.) “for” following such adjectives as available, difficult, late, perfect, famous, responsible, useful…*Florence is famous ... *Thank you. It was very kind of you to help me.*You are very kind to me “from” following such adjectives as absent, different, safe…*The film was quite different from what I expected.(Bộ...