N5: Grammar points
Quick summary of N5 grammar
A statement sentence can be created using XはYだ（です）- "X is Y", where です is a more polite version or だ (however there are differences).
General rules for particles retention before だ:
- が、を、へ、に (time, location) - must drop
- に (indirect object, agent, direct contact) and で (location, means) - may drop
- で (reason)、と、から、まで - usually do not drop
A statement sentence can be turned into a question sentence by adding か at the end?
XはYですか - "Is X Y"?
XのY - where X, which comes before の, modifies the Y.
Y can be omitted if is clear from the context