Giving advice or making a suggestion in English

Subject + Should + Base Verb

Used to give advice or suggestion in the presnt

For example- You should not eat junk food and you should wake up early.

Should + Have + Past Participle

Should is used for advice in the past.

For example- You should have studied more for your exams. ( contracted form- should've)

expressing desire, polite requests and questions, opinion or hope, wish and regret.

Wish/Desire- I'd love to live here.

Polite request- Would you open the door, please? 

Opinion- I would have to agree.

Would as a past tense of will or going to is common in reported speech:

She said that she would come to my house.. ("I will come to your house")

Why didn't you charge your phone? I told you it would die soon. ( "Your phone is going to die")