I lost the Salvation forever. (I blasphemed against the Holy Spirit knowing what I'm doing) Can I still pray for my relatives? ?

It simply isn't possible to commit blasphemy against the Holy Spirit in this day and age as the circumstances under which it was committed in early New Testament times haven't existed since the last apostle passed on.

Firstly, to commit this sin there must be two heavenly witnesses present as was the case when Jesus was casting out demons from a man who was both blind and dumb.

When the Pharisees both saw it and heard it they openly, knowingly, deliberately , willfully, publicly accused the Lord of working the miracle by the power of Satan.

Jesus had said, "I am the Son of God" also He said, "The works that I do are not Mine but My Father's in heaven" here was a two-fold heavenly witness present when the miracle was performed. Here Jesus made the truth very clear when He said, "If I had not done among them the works that no other had done then they had not sin. Now they have seen both Me and My Father and hated both Me and My Father, and now they have no cloak for their sin. (Note: cloak means covering or forgiveness).

Once saved always saved as when you first trusted in the Lord Jesus you name was written in heaven NEVER to be erased. If it were possible for any one to lose their salvation then the Lord Jesus would have to return and die all over again. When the Lord Jesus hung on the cross, the Father poured out upon Him the sin of the whole world being all your past, present and future sin which is exactly why you can NEVER again be lost. When you sin as we all do, on confession, you are immediately forgiven and your FELLOWSHIP with the Lord is immediately restored as your status as a child of God always remained.

As long as a person is still living, any sin he may have committed can still be forgiven provided he properly repents.

You could have blasphemed the wrong holy spirit so there's still a chance..

The sin against the Holy Ghost is when a person comes to know God with surety through the power of the Holy Ghost and then turns his back on Him. This hateful person has no interest in repentance and will be cast out of God's presence by his own choice with like minded folks (i.e. Satan).

Very few people are capable of committing this sin because God protects those without sufficient faith by not providing spiritual knowledge through revelation. We cannot be held accountable for what we do not know.

It is Satan who whispers to us that we are not good enough or that we are beyond repentance. God ALWAYS forgives those who sincerely repent. The voice of Satan produces doubt, fear and confusion.

Just begin to obey all of Jesus' sayings .

No you can't. God is sulking.

The only unpardonable sin is that of refusing forgiveness.     Read 1 John 1:9.   Claim it

dont u know how to spell "prayers"? ONCE SAVED ALWAYS SAVED...WE are not buying what u try to sell...