Question

As earth situated middle then how moon receives sunlight during full moon day

Answer 1

New Moon. Imagine the earth, moon and sun arranged in a straight line, with the moon situated in the middle. Light from the sun lights up the side of the moon facing ...A full moon occurs when one side of the moon is fully illuminated from our perspective on Earth. The sun, earth, and moon are lined up, with the earth in the middle. 

Answer 2

The moo's orbit is not perfectly aligned with the earth's orbit around the sun . There is a 5° tilt to the orbit of the moon to rhe orbit of the earth around the sun and the two paths overlap twice year.If there is a full moon when they are overlapped , there will be Eclipse