英语语法问题1应该如何改正这几句话啊?1.do they have a master or other 2.what differences in eating habits in different countries 3.what differences in New York

Do they have a teacher or someone helping them?
What are the differences in the eating habbits of different countries?
What are the differences between the eating habbits of New York and that of 某某地方？

第一句话不知你想表达什么意思
第二句what's the differences……
第三句what is different in ......

1.Do they have a master or other
此处的 other 是不定代词,但是 other 不能单独出现.如果是泛指一个,要用 another,如果是特指,要用 the other,否则就得用复数形式 others.这里显然不是指另一个 master,而是 master 以外的其他同类项,因此需要改为 others,即：
Do they have a master or others?你有教师或者其他的人吗?
2.What differences in eating habits in different countries
一个句子是由主谓结构构成的,因此句子中的谓语动词是必不可少的,但是在这个句子中却缺少作谓语的动词.有两种改正办法：
1）What are the differences in eating habits in different countries?不同国家饮食习惯中的区别是些什么?
2) What differences are they in eating habits in different countries?在不同国家的饮食习惯中,它们是那些区别.
3.What differences in New York
同上,在本句中同样缺少谓语动词,应该用上述同样的方法改正：
1）What are the differences in New York?在纽约的区别是些什么?
2）What differences are they in New York 在纽约,它们是哪些区别?