Do you want to go to the movie?=( Would ) you( like ) to go to the movie?
分析 want to do sth = would like to do sth 想做某事.

 
2.Is Tom there?→May I （speak to ) Tom?( 打电话的习惯用语）

3.There  (is )some milk in the glasses.
分析 milk是不可数名词,故用单数IS




加油!不明白再问!