（英语小白问题）请教some,any,can,could的使用。谢谢

Question

麻烦了，向大家请教这个问题。是我侄女的作业题目，我文化不高，实在扯不清楚了，又不知道她做的答案是不是对的，只能上来求答案了，再去对照她的本子检查。先谢谢你们了。
选项：some,any,is,are,were,can,couldnot,werenot,wasnot.
题目：
1.there____a slide here before.
2.there____some trees before.
3.there____some flowers on the table now.
4.there____any ducks in the park before.
5.we____play basketball now.
6.I____swim before,But I can swim now.
7.there are____new students in our classroom.
8.Are there____trees in the garden?
9.There____a big ball here.
还有不同的声音吗？我刚刚对照了她的作业本，她第一题选的was not,第四题选的were not，能告诉我为什么错了吗？谢谢

Answer 1

1 wasnot
2 were
3 are
4 werenot
5 can
6 couldnot
7 some
8 any
9 is
楼上的第二题错了，应该是肯定的WERE,如果用了否定were not那么后面的some应该是any了；第五题错了，后面是play 不是playing；

Answer 2

1.there__was not__a slide here before.
2.there__were not__some trees before.
3.there__are__some flowers on the table now.
4.there__were not__any ducks in the park before.
5.we__are__playing basketball now.
6.I__could not__swim before,But I can swim now.
7.there are___some_new students in our classroom.
8.Are there__any__trees in the garden?
9.There__is__a big ball here.

补充：
十分不好意思，是我看错了...是我的疏忽
她是对的。
第一题选的was not,第四题选的were not

Answer 3

somesomesomesomesomesomesomesomesomesome