Why doesn't the earth block out the light between the sun and the moon during a normal month?

The Earth doesn't block out the light between the Sun and the Moon during a normal month because the Moon's orbit is tilted relative to Earth's orbit around the Sun. This tilt means that the Moon usually passes above or below the Earth's shadow. Only during a lunar eclipse, when the Earth is directly between the Sun and the Moon, does the Earth block the sunlight from reaching the Moon.