1 where the shop is
2 which subject you liked （与前面的过去式一致）
3 if/whether she can
4 if i would/can clean my
5 is (客观事实，用一般现在式）
6 is （客观事实，用一般现在式，一般不用过去式）
1 where the shop is
2 which subject you like
3 if she can
4 if i can clean my
5 is
6 is
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