I worked/have worked at a school for two years.

[ringu20]

For example I worked at a school for a time. Then I quitted. Should I say "I worked at a school for two years" or "I have worked at a school for two years"?

If I still work, should I say "I have worked at a school for two years" or "I have been working at a school for two years"?

I know we can't use present perfect continous in the first sentence and can't use simple past in the second sentence. But I can't be sure which one is correct.

 

[jutfrank]

Should I say "I worked at a school for two years" or "I have worked at a school for two years"?

It depends on the context. In the context of talking about your work experience, for example, the latter would be appropriate.

If I still work, should I say "I have worked at a school for two years" or "I have been working at a school for two years"?

Again, depending on context, you could use both, but it's easier to imagine a context where the continuous version would be used.

I know we can't use present perfect continous in the first sentence and can't use simple past in the second sentence. But I can't be sure which one is correct.

I don't follow what you mean here.


If you want to understand which of two forms is correct and why, you really must understand how the sentence is meant to be used in context.