Student or Learner
When we talk about things which we know are not true, we can use a past tense with a present meaning after as if/though. This emphasises the meaning of unreality.
- She looks as if she is rich. (Perhaps she is.)
- He talks as if he was rich. (But he is definitely not.)
Michael Swan "Practical English Usage" (3rd edition).
1. Do the above sentences have the meaning of unreality when the whole situation is happening in the past? (For example: She looked as if she was rich.)
2. Is there any means to emphasise the meaning of unreality in case the answer to the first question is "No, they do not have the meaning of unreality in the past."?