this is for a german class: Which question words help you figure out what the subject of a sentence is$?$

$2.$ Under what circumstances can you use kein for negation? What endings can

kein take? Give two examples in two complete sentences that are different

from the ones in the chapter above.

$3.$ How is the Sie$-$Imperative formed? Write two commands directed at your

instructor$/$a person you might address with Sie.

$4.$ What other questions do you have?