Questions & Answers about Nie zapomnijcie, bo to jest bardzo ważne!
Why does the verb zapomnijcie end in -cie?
The ending -cie makes this a command for a group of people (plural "you"). If you were telling just one person not to forget, you would drop the -cie and say Nie zapomnij.
The dictionary form is zapomnieć. Where does the -ij- part in zapomnijcie come from?
Command forms don't always look exactly like the dictionary form. For this verb, the command is built on the base zapomnij. You use zapomnij to command one person, and add -cie to command multiple people.
Why is the word for "important" written as ważne and not ważny?
Adjectives must match the gender of the word they describe. Here, the adjective describes the word to (this/it), which is a neuter word. The neuter ending for adjectives in this case is -e, making it ważne.
Is bo the only word for "because"?
Yes and no! bo is very common in everyday spoken Polish because it is short and easy to say. You might also remember the word ponieważ, which means the exact same thing but sounds a little more formal.