Could you watch my kid while I’m at the doctor? Could you watch for the bus and text me when it is coming? Watch out for the speed trap by the school. The tickets are expensive.

I am busy. Could you watch my kid for me? (= "take care of" - last definition below) The Oxford Learner's Dictionaries are an excellent resource. There are good examples and you can also listen to the pronunciation of the words. https://www.oxfordlearnersdictionaries.com/definition/english/watch-out?q=watch+out watch out phrasal verb watch out ​ (informal) used to warn somebody about something dangerous Watch out! There's a car coming! https://www.oxfordlearnersdictionaries.com/definition/english/watch_1?q=watch watch verb BrE /wɒtʃ/ ; NAmE /wɑːtʃ/ ​[transitive, intransitive] to look at somebody/something for a time, paying attention to what happens watch somebody/something to watch television/a football game watch somebody/something doing something She watched the kids playing in the yard. ​[transitive] watch somebody/something (for somebody) to take care of somebody/something for a short time Could you watch my bags for me while I buy a paper?

Thank you very much.

I am busy; could you watch my kid for me?