have sent / sent?

兩個都得

e.g.
I will send the cake tomorrow.
I sent the cake yesterday.
I have sent you all the info.

我已經寄左封電郵給你

I have sent you an email / I have sent an email to you./ I have emailed you. perfect tense - not ime iindicated

I sent you an email yesterday/ I sent an email to you yesterday/ I emailed you last week = past tense with date inidcated.