B1
Mixed Conditionals: Combining Past and Present
Mixed conditionals combine one time in the condition and another in the result.
Past → present
A past condition, a present result:
If I had studied medicine, I would be a doctor now.If we had taken a taxi, we wouldn't be late.
Present (state) → past
A present fact or quality, a past result:
If I weren't afraid of flying, I would have visited you.If she spoke Japanese, she would have got the job.
This is not a “third tense”. Mix only when the two time lines really differ.