This water is very clean.(改为现在时否定句)This water isn't very clean.
It is fun to drink this way.(改为过去式否定句)It wasn't fun to drink this way.
Daming wants to have a picnic.(改为现在时否定句)Daming doesn't want to have a picnic.
I didn't being any drinks.(改为现在时否定句)I don't have any drinks.我觉得你这儿可能打错了哈
I like plating baskerball.(改为第三人称单数) He likes playing basketball.
Simon went to the park.（改为现在时否定句）Simon doesn't go to the park.