Why no eclipse every full and new moon?

During the lunar eclipse, the Sun is between the Sun and the Moon while the Earth and the Moon are exactly in line. In this case, the shadow of the Earth falls on the Moon. However, during the Lunar Eclipse, the Moon does not stay completely dark. Because although the Earth blocks the direct rays from the Sun, the rays whose direction is changed by the particles in the atmosphere can reach the Moon. For this reason, the Moon appears reddish during the Lunar Eclipse.

The Moon completes its orbit around the Earth in about a month. However, lunar eclipse is not observed regularly every month. The reason for this is that the orbital plane of the Moon does not coincide exactly with the Earth's orbital plane. The angle between the orbital plane of the Moon around the Earth and the orbital plane of the Earth around the Sun is about 5°. The orbits of the Moon and Earth intersect twice a year. Partial or complete Lunar eclipse takes place during these times when the Moon approaches the Earth's orbit around the Sun.