问问几个英文语法,谢谢

1.What does lisa's parent have?这句子本身有误：parents是复数，谓语动词怎么能用单数？
2.He doesn't have a nice basketball。加上一个助动词即可。
3.Does lili have a nice car？同样要加助动词，帮助完成疑问形式。

你问的应该是单三形式吧：单数第三人称，比如：he、she、it等，而且是一般现在时态中。

1.What does lisa's parents have a nice ?
2.He doesn't have a nice basketball.
3.Does lili have a nice car ?
在单数名词变复数的情况下要加s或es。
1.在以e结尾的名词后加s。如：eyes
2.一般情况下在名词后直接加s。如：banks
3.在以s,sh,ch,x,o结尾的名词后加es.如：box-boxes
4.在以f,fe结尾的名词将f,fe改v再加es.如：knife-knives
5.在以辅音加y结尾的名词将y改i再加es。
6.在重读闭音节中，单词中只有一个元音并且以一个辅音结尾的那么双写这个辅音再加es.
7.还有一些不规则的名词复数，如：foot-feet

1 正确的句子应是Lisa's parents have a nice baseball bat.
提问句是:What do Lisa's parents have?

2 He hasn't a nice baseball. 或He doesn't have a nice baseball.

3 Does Lili have a nice car?