用how long。How long have you lived here?I have lived here for a long time.在现在完成时出现for+一段时间,谓语动词用延续性动词。
or接一段时间的省略问题
一、当for引导的时间短语用来修饰具有静态意义的动词是常常可以省略。如:
They lived in China (for) seven years.
The meeting lasted (for) two hours.
They will be in Chicago (for) a year.
二、当for与all开头的名词短语连用时,必须省略for.
She’s been lying in bed all day.
三、当for短语修饰动态动词时或者用于否定句是,则借此for不能省略。
I’m going away for a few days.
I haven’t seen him for three weeks.
四、当for用在句子开头时,一般也不能省略。请比较:
a. He lived abroad (for) six years.
For six years, he lived abroad.
b. He waited anxiously at hospital (for) some time.
For some time, he waited anxiously at hospital.