no, you can not tame a ghast
You have to be in the Hell biome and the ghast needs a 5x5x5
Ghast tears are used to make many potions.
When you kill a Ghast you often get a "Ghast Tear" which you use to make potions.
You can spawn it anywhere. If you want to let it go, release it outside of your house. If you want to keep it, Build something out of bedrock. (Do this in creative or else the ghast can kill you.) P.S Bedrock is unbreakable unless youre in creative you can break it
To get a Ghast in "My Singing Monsters," you need to breed a Maw and a Deedge on the Air Island. Make sure both monsters are at least level 4 to increase your chances of breeding a Ghast. Once you successfully breed them, you can place the Ghast on your island and enjoy its unique sound. Keep in mind that breeding times may vary, so be patient!
You cant
IF you mean this as in you cant break a block just reinstall the game if you mean the block is broken and the item that comes from it is on the floor check if your inventory is full and get rid of some items also blocks stack up to 64
David Conrad
you cant
You cant
No beace it cant be scratched and if cant be scratch than how is it going to break