The past perfect is used to talk about events that happened earlier than another early moment. The past of the past.
Structure: had + past participle
So as we saw, we can use “as if” and “as though” to talk about hypothetical situations with the past perfect.
● My colleague looked as if he had worked all night.
● I sent her a message. But my friend seemed as though she hadn’t checked her messages.
● My friends looked at me as if I had done something horrible.
● I confirmed the time with him. But it sounded as if he had forgotten about our meeting.
● My friend called at me as if she had worried about something.
● I went to the beach earlier today. I swam as if I had drunk a ton of those energy drinks.
● My family did a warm welcome as if she had been lost for a year.