going to be proposed to

Can anyone help me please?

I have no idea why to is used in the first two sentences and not in the third. I wouldn't use it, because I have never thought it was needed. And, if it's used in the first two, I think it should also be used in the third. Yet the first two sound incorrect to me, but I may be wrong. Maybe it is optional, or even mandatory.

By the way...

Wonder123

Wonder123I came across the sentences as below.

She is going to be proposed to.she is going to be proposed to by her lover.He is going to be proposed tonight.Why to add "to" in 1st and 2nd sentences? is it necessary?is the third sentences correct?Please advise.Thanks

The 'to' is mandatory in all three sentences, so #3 is wrong (that's as

Rover_KEThe 'to' is mandatory in all three sentences

Are you talking about the second to in the first and second sentences?

Rover_KE(that's assuming that she is going to propose to him

no my context is different, it something like this "she is going to be welcomed by one of the most famous person tonight"

Wonder123 Are you talking about the second to in the first and second sentences? Yes.

"He is going to be proposed tonight" means nothing like

"She is going to be welcomed by one of the most famous people tonight".

Rover_KE"He is going to be proposed tonight" means nothing like"She is going to be welcomed by one of the most famous people tonight".

Ok got it thanks, can we write the sentences like below.

He is going to be proposed to tonight
You should not let him know that he going to be proposed to tonight.
He is going to

To propose to somebody is to ask them to marry you.

If somebody is proposed to they are asked if they want to get married.

Ok thanks, and how the sentences above, are they ok?

Yes.

Ok thanks