介词后一般可跟名词或相当于名词性质的词语，如：名词或名词性从句、代词、动名词或动名词短语、数词等

例如 ​go to school/look forward to seeing youWe are thinking of going to France.2）介词后跟不定式（to +V)的情况只限于介词but和exceptI cannot see anything but to keep silent.除了沉默我无话可说。3）不定式带疑问词的动词不定式或名词性从句。 Do you have any idea about how to reslove this problem?要解决这个问题，你有什么好办法