My student wrote:
Hannah recommended that Sasha rents first before buying a house or an apartment because it is important to know the area.
I corrected him and said it should be:
Hannah recommended that Sasha rent first before buying a house or an apartment because it is important to know the area.
However, I didn't know what to say when he asked me why.
Now, I’m wondering if both are correct, but I still don’t know why.