singapore is really a beautiful country.i am considering to visit it

没有consider to do 这种形式,考虑作某事是consider doing,所以后面应该改成considering visiting it.可是consider后面加的动作没发生呀，表示未发生的动作不是用to do吗考虑做某事就是consider doing sth. 只有在被动语态中才能用动词不定式，如：I was considered to make my plan for vacation.