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.