I have 2 sentences that I don't understand:
1.) The girl [[sleeping]] in the room is my sister. 2.) People usually can get a sufficient amount of the calcium their bodies [[ need ]] from the food they consumed.
These 2 sentences have one verb already. (is for (1) and get for (2)) why they don't use the same.
And I heard that without the word "That" I have to use Ving after that, what is it? Where can I find the source to study.