另外请问 like用在第三人称单数时加s,否定句,疑问句中时不加s吗?

问题描述:

另外请问 like用在第三人称单数时加s,否定句,疑问句中时不加s吗?

He likes playing computer.
否定句:He does not like playing computer.
疑问句:Does he like playing computer?
否定和疑问是要用助动词,动词用原形