“有时间” 和“有时候”容易出错是，因为在英文中“时间”和“时候”都是time 和 when 的意思。
可是其实，“有时间”和“有时候” 在英文中是完全不一样的意思：
有时间=have+ time= to have time/having time.
有时候= sometimes= 有的时候。
比如：你有时间的时候，我们一起学中文，怎么样？
As a professional Mandarin instructor with almost two decades worth of teaching experience in American schools, I came to recognize how language-learning in a school setting is only one step in the long journey of acquiring a foreign language. I felt a need and urge to bring my profession beyond school, and I believe professional teaching should be accessible to anyone at any point in their life. It is with this belief that I founded MAD Mandarin LLC in 2018 with the goal to incorporate the latest teaching methods with my own innovative approach of Mindful-Active-Dynamic to positively achieve the best language-learning results.