Models: I haven’t seen them since that incident. -I haven’t seen them since that happened.
He admitted that he had forgotten their faces since their meeting. - He admitted that he had forgotten their faces since they (had) met.
1.You have never reproached me once since our separation (Saxton). 2. I found Mr. Chon’s go-down. Nothing had changed since my last visit (Greene). 3. Ever since our days on the farm I’ve wanted to tell you but could not (Gordon). 4. This “Department of Dirty Tricks” . as it is called, has had a hand in every American plot against peace since the end of the war (Daily Worker). 5. And as for himself – work, work, work that’s all he had been since his discharge from the army (Gordon). 6. Since his reunion with Ren Anthony had spent all the time he could with her (Gordon).