They do not directly turn into zombies, but they turn into zombie villagers. Zombie villagers can be cured using golden apples and potions of weaknesses.
to be creative
In creative mode you can spawn a zombie with the egg
To turn villagers into zombies in Minecraft, you must first ensure that a zombie attacks a villager. When a zombie comes into contact with a villager, it has a chance to infect the villager, turning it into a zombie villager after a brief period. To increase the likelihood of this transformation, you can use a zombie spawn egg or create a dark area where zombies can spawn and find the villagers. Once the transformation occurs, the zombie villager can be cured using a splash potion of weakness and a golden apple.
In creative there is a spawn egg for spawning a villager, but in survival you have to find a village, there its a lot of villagers walking around:)!
zombie pigman are minecraft mobs found in the nether and spawned in creative.
Impaling a zombie's head on a still lit light bulb, scene from the movie Dead Alive.
Zombies are one of the first mobs, or mobile entities, in Minecraft. The zombie attacks you dealing damage depending on your difficulty setting and what armor you are wearing. Zombies also attack villagers and upon killing them, turn them into zombie villagers.(Zombie villagers can be healed when affected by weakness and fed a normal golden apple.) Zombies spawn in villages, dark areas, and when it is night. If an area is well lit a zombie cannot spawn unless its a siege in a village. The zombies will set on fire when exposed to daylight. On rare occasions zombies can pick up drop items and wield them as weapons or if it is armor or a head, as clothing. (Zombies do not set on fire by the sun if wearing head gear.) On normal difficulty or higher zombies can also break down wooden doors after repeated hits.
You cannot make an experience potion. Some villagers trade for them.
You can buy chainmail armour from villagers and you can also kill zombie with chainmail armour on them but its a rare drop so don't get excited thinking you will find one. You can also find chainmail armour in the creative inventory. With mods and TMI (Too Many Items) you can craft them the same way as other armors but with "Fire" instead. That's cheating, though. :)
You can't make a name tag in Minecraft. Instead, you must find it in chests, find it in fishing or trade with villagers for it.
No, villagers do not eat.