1) Pattern Talk

I was + ing + when you called me.  
네가 전화했을 때 ~하는 중이었어.

I was driving when you called me. 
네가 전화했을 때 운전하는 중이었어.

I was cooking when you called me. 
네가 전화했을 때 요리하는 중이었어.

I was sleeping when you called me. 
네가 전화했을 때 자는 중이었어.

I was working when you called me. 
네가 전화했을 떄 일하는 중이었어.

I was showering when you called me. 
네가 전화했을 때 샤워하는 중이었어.


2) Role Play

A : I called, but you didn't pock up.

전화했었는데 안 받더라.

B : I was showering when you called me.

네가 전화했을 때 샤워 중이었어.

A : I figured you were busy.

바빴을 거라 생각했어.