than有两种词性：连词和介词.
所以其后可以跟句子、-ing、不定式、、代词、名词和相当于名词的词.
She is a better player than (she was) last year.
He loves me more than you do.
She should know better than to poke the animal with her umbrella.
I'm older than her.
It never takes more than an hour.