That sounds great.sounds 为啥加s.

That sounds great.sounds 为啥加s. that sounds good 这里sound为啥加s that sounds great That sounds good中的sounds为什么要加s That sounds interesting为什么加S That's sounds good.和 That's sounds great.哪个对?有什么区别? That sounds great.(会变否定句或一般疑问句吗?-------- 为什么加“s” → → That ' s sounds great .Let ' s do it .哪哪错了 Let's~That sounds~ It's sounds great,为什么sound要加s? sound interesting 为何不加,That sounds good 为何要加s,如果用that sounds sounds great