One, whom I don't know, posted this sentence on one Russian forum, where people study English. The sentence comes from here
- They've been living with his mother while they look for a house
Is it possible to place the subordinate clause in the Present Simple if the main clause is in the Present Perfect Continuous tense?
As far as I know this is a mistake. It should be either of the two:
- They are living with his mother while looking for a house.
- They were living with his mother while looking for a house.
The second appearance of the word "they" makes me uncomfortable too.