6.  We would gladly buy the house if it ....... so small.   would not be were not had not been is not

We would gladly buy the house if it were not so small.

We would gladly buy the house if it would not be so small.

We would gladly buy the house if it is not so small.

We would gladly buy the house if it had not been so small.

We would gladly buy the house if it were not so small.