Answer:
a-the sentence is actually wrong. It is using the past participle without the helper verb. One can say- je n'ai pas compris or je ne comprends pas.
b- imparfait du subjonctif
Explanation:
Le Petit Prince has other odd mistakes as well-- S'il vous plaît monsieur, dessine-moi un mouton-- mixing up the tu and the vous.
Answer:
1. Wash your hands.
2. sneeze or cough in your elbow / arm.
3. Stay at least two feet from someone.
Explanation: