Can you use the tweenService to position a part?

Here is a script that I used to make 4 parts slide upwards smoothly:

local door1 = game.Workspace.door1
local door2 = game.Workspace.door2
local door1_1 = door1:WaitForChild('door1')
local door1_2 = door1:WaitForChild('door2')
local door2_1 = door2:WaitForChild('door1')
local door2_2 = door2:WaitForChild('door2')
for i = 1, 20 do
                door1_1.CFrame = CFrame.new(door1_1.Position + Vector3.new(0, 0.5, 0))
                door1_2.CFrame = CFrame.new(door1_2.Position + Vector3.new(0, 0.5, 0))
                door2_1.CFrame = CFrame.new(door2_1.Position + Vector3.new(0, 0.5, 0))
                door2_2.CFrame = CFrame.new(door2_2.Position + Vector3.new(0, 0.5, 0))
                wait()
            end

I don't think you can use Tweening for parts. Also, I don't think a Vector3 value is allowed in a table, just like the error says.