- whereisthetoilet?
- where is the toilet?
- 前面应该加上 Excuse me, 这样客气点儿。洗手间在哪儿？toilet 可以用washroom/restroom等词替换。go to the toilet 去（上）厕所
Where can I find the toilet?
Where is the bathroom?
Where can I wash my hands?（注意呦，hand用复数噢）
Where can I find the men's/ladies' room?
Where can I powder my nose?
以上各句都是找厕所时用语。