The moon can only be seen because it "borrows" the light from the sun. When the moon orbits the Earth the sunlit side of the moon changes - causing the moon to look like it changes shape. Many casual observers often believe that the moon's phases are caused by the Earth blocking the sun's light - this is not true, as the moon only passes through Earth's shadow occasionally.
u cant see the moon at night when its new moon I'm not sure about the day
You can see the moon sometimes
The moon
You see just that part of the moon that the sun is shinning on.
Unless there is a lunar eclipse, half of the moon is always lit by the sun. Sometimes we see the lit half dead on (full moon), sometimes side on (half moon) and sometimes we don't see any of the lit surface (new moon) - usually we see something in between.
Sometimes!
Sometimes the brightness of the light from the moon drowns out the star's light.
the moon is in the opposite of the sun
You can't see the moon during the 12 to 30 hours before and after the New Moon. So that's anywhere from 1 to 2-1/2 days during the month, depending on the exact angle of the ecliptic to the horizon, and the moon's orbital inclination relative to the ecliptic. (Those things change from month to month.)
Sometimes, it's simply just too cloudy to see the moon. Sometimes, there's a lunar eclipse, and for x minutes, the moon appears to not exist.
sometimes clouds may block your view of the moon
Sometimes, yes you can. I know here in Texas, about half the time you can see the moon almost anytime of day.