1) Vergiss nicht deine Hausaufgaben zu machen. [Don't forget to do your homework.] 2)Ich habe Angst, was falsch zumachen. [I'm afraid doing something wrong.] 3)Kannst du mir helfen Pfannkuchen zumachen? [Can you help me to do pancakes?] 4)Kannst du den Vorhang zumachen? [Can you close the curtain?]
(p. S. I think I should have said could you close the curtain, Plz)
@ziannyzhao I‘m afraid not. Zumachen is different from ‚machen‘ preceded by ‚zu‘. ‚Zumachen‘ exclusively means ‚to close‘ . He closed the door. Er machte die Tür zu. The thing is that the prefix ‚zu‘ is often in a different position than ‚machen‘, i.e. it is usually separated from the infinitive form‘ zumachen‘ stressed on the first syllable.