Hi,<br/><br/>Are the following sentences natural to a native ear?<br/><br/><span style="color:#0000ff;">1. Would this have been a big market place back then?</span><br/><br/><span style="color:#0000ff;">2. They would have had to close these doors to stop cold winds from coming into the house.</span><br/><br/><span style="color:#0000ff;">3. Would they have had to close these doors to stop cold winds from coming into the house?</span><br/><br/><span style="color:#0000ff;"> </span><br/><br/>Thanks,<br/><br/>MG.