てほしいwant someone to (do)
てほしい is for what you want someone else to do: "I want you to…", "I want him to…". When nobody is in control, as with the weather, it is "I hope".
I want my mother to get some rest.
I don't want you taking photos here.
I hope it is sunny tomorrow.
How to form it
(person に) + Verb in the て-form + ほしい
ほしい changes like an い-adjective: polite ほしいです, past ほしかった. Also written 欲しい.
Wanting it not to happen
Verb in the ない-form + で + ほしい
行かない → 行かないでほしい.
Someone else does it
English says "want" either way. Japanese uses たい when you will do it yourself, and てほしい when someone else will.
I want you to see this film.
Someone else watches.
Not said: 友達に
(I want my friend to come.)
友達に来てほしいです.
The person you want to act takes に. When you are talking to that person, they usually go unnamed.
I want my younger brother to eat more vegetables.
I want you to check this figure once more.
Asking with it: てほしいんだけど
Said to the person, it is a request. With friends and family, people add んだけど and stop there: an everyday way to ask.
I'd like you to help me carry this box.
To a teacher, a boss or a customer it is too blunt, even with です: you are telling them what you want. People ask with a question.
to your teacher
Sounds odd: 先生、
Professor, I want you to tell me how to read this kanji.
教えていただけませんか.
Hoping it happens
Nobody can be asked to stop the rain. With things like that, てほしい is a hope, and the thing usually takes が.
I hope the rain stops soon.
I hope spring comes soon.
I hope my grandmother gets well soon.
A person still takes に.
ないでほしい: "I wish you wouldn't"
This is how people say what bothers them. To the person's face it is a firm "please don't". About people in general it is a complaint.
I wish you wouldn't get so angry.
I don't want people making loud noises at night.
I wish you wouldn't talk like that.
やめてほしい, "I wish you'd stop", does the same job without ないで.
Other people's wishes
You can ask someone what they want you to do, but you can't state it for them as a plain fact. You say what they told you.
What do you want me to do for your birthday?
Not said: 母は
(My mother wants me to come home early.)
My mother says she wants me to come home early.
Close neighbours
てくださいN5
Asks outright and expects a yes. てほしいんだけど only says what you would like.
Please help me for a moment.
The same wish, put as a favor you would receive. ていただきたいんですが is the one for someone above you.
I would like you to look at this document.
させてほしいN3
With させて in front, you are the one who would act: "I'd like you to let me".
I'd like you to let me think for a while.
Check yourself
1"I want my husband to stop smoking."
夫に
Choose an answer to see why.
2"I don't want you to tell anyone."
だれにも
Choose an answer to see why.
3You want your boss to look over your report. Which is natural to say to her?
Choose an answer to see why.
More detail
てほしくない
The other negative. ないでほしい asks for something not to happen. てほしくない says you don't like the idea.
I don't want my children to play in dangerous places.
てほしかった
In the past it is usually a regret or a complaint: it didn't happen.
I wish you had told me sooner.
More sentences
I want everyone to attend the meeting.
I want my younger brother to choose his own path.
If possible, I'd like you to let me know the result by the end of today.
I hope this tradition lives on.
I hope the wind dies down soon.
I don't want you to interrupt me while I'm speaking.
I don't want people checking their phones during the meeting.