"问" means "ask" as in the sense of "to propose a question and expect an answer." For the sense of "require," the translation should be "要求(yāoqiú)"
When do you use 问 'wen', or 'ti wen'?
it's very complicated...
as a general rule, use wen more than tiwen
What is the pinyin for this sentence?
Wǒmen wèn yīshēng
Is there a way to say "Ask the doctor." as a command to someone?
Just directly translate it to 问医生. For "go ask the doctor", it's 去问医生.
Ì cant type ī and (other characters) cos mï kîíboard dont have įt....
You're using GBoard, right? In that case, just add Chinese Pinyin, then you can long press to get to all the stuff needed for Mandarin, including double diacritics like ǚǖǘǜü (all hidden under "v")
Is this a statement or a command, like 'let's ask the doctor'?
More like a statement. We still can understand as "let's ask doctor" if you say it when someone in trouble. Better way to say "let's ask doctor" is 我们来问医生 or 我们问医生吧 or combine it be 我们来问医生吧