My sister often clean rooms to help my parents on Sundays .为什么clean不加s

来源：学生作业帮助网编辑：作业帮时间：2024/05/15 02:52:59

你好,这道题的正确答案是：
你说得对,这是一个错句.
因为主语是My sister,为第三人称单数,
on Sundays,在周日,所以时态为一般现在时
因此clean应该加上s
这句话翻译为：
我姐姐经常在周日帮我父母打扫房间.

本句时态为一般现在时，当主语为单数第三人称时，谓语动词需加s, 此为语法规则。

正确表达应该加s, 即用第三人称单数cleans才符合表达。

总觉得应该是my sister often helps my parents to clean rooms on sundays

My sister often helps Jack (study) English My sister often (study)Japanese on Sundays. My sister often helps my mum (clean)the house. My sister often helps my Mum______(clean)the house. My sister often helps me in my math.修改病句 My sister often helps me with my English的同义句是什么?句式为My sister often help me I often study English with my sister (对my sister提问 My sister often walks to school同义句My sister often____ _____ _____ _____.是四条线 My sister often helps me learn English改为同义句 My sister often gets back home ____later than we d My sister often goes shopping on Sundays.改为否定句 my little sister often _______（cry） at night My sister often goes shopping on Sundays.改为否定句 my sister often plays the piano.改为否定句 My sister often takes photos on Sundays.(改为一般疑问句) my sister often helps me怎样改成一般疑问句 my sister often（）（）（my sister often（）（）（）〖听磁带〗to practice listening. 最上面那个是：My sister often helps my mother co最上面那个是：My sister often helps my mother cook dinner(改为一般疑问句)