Put the verbs in brackets into the past perfect simple or the past perfect continuous. I was tired because I (work) hard all day.
When I got to the station, the last train (already/leave).
Ben (live) in Rome for two years before he to Paris.
Sally (eat) so much chocolate that she felt sick.
My hand was hurting because I (forget) to take my umbrella.
He was pleased because he (pass) his exam.
I (study) for three days before I took my test.