Dialogues

1. 请送我去中心医院。Qǐng sòng wǒ qù Zhōngxīn yīyuàn.
Please send me to the center hospital.
But You also need to know more about taking taxi. you want to go to the centre hospital.You can say to the Chinese taxi driver: Qing3 song4 wo3 qu4 zhong1xin1 3, please. song4 to send. wo3, 4 wo3, send me. qu4, to go 1xin1, center. yi1yuan4, 1xin1 yi1yuan4, center hospital.
 

2. 知道怎么走吗?Zhīdao zěnme zǒu ma?
Do you know how to get there?
you are wondering if the taxi driver know how to go there. For that you can say: zhi1dao zen3me zou3 ma? zhi1dao, to know. zen3me, 3, to go. ma, a particle, indicating this is a question.
 

3. 请您开慢点儿。Qǐng nín kāi màn diǎnr.
Please go a little slower.
If you think he drives a little bit fast. you'd like to ask him to drive slowly. The Chinese for that should be: Qing3 nin2 kai1 man4 yi4 dian3er. Qing3, please. nin2, the polite form of ni3. kai1, to drive. man4, slowly. dian3er, a little bit 

4. 就停在门口吧。Jiù tíng zài ménkǒu ba.
Please stop at the entrance.
Finally you arrive at the center hospital, you want to tell him to stop in front of the gate. Then you can say: Jiu4 ting2 zai4 men2kou3 ba. jiu4, just. ting2, to stop. zai4, at. men2kou3, entrance. ba, a particle used at the end of the sentence to indicate suggestion, request, etc.