The removal of the conjunction destroys the relationship between the words, and this brings out its function in the sentence:
Put away the pen and the ink-stand. Put away the pen the ink-stand.
Put away the pen or the ink-stand. Put away the pen the ink-stand.
You could write with your left hand if you touched the letters with that hand. You could write with your left hand you touched the letters with that hand.
The conjunction must be placed between the words it connects: otherwise the meaning is changed or destroyed:
Put away the pen and the ink-stand. Put and away the pen the ink-stand.
The "Children's House" is attractive because it is pretty. The "Children's House" is attractive it is pretty.
Coordinate conjunctions: and, or, neither, nor (e, o, nè).
--Come to "silence" where you are _and_ move only at my call.
--Come to "silence" where you are _or else_ move silently among the chairs.
--Walk on tip-toe about the room, being careful _neither_ to meet _nor_ to follow one another.
--Tell two of your schoolmates _that_ you know a conjunction.
Adversatives: but, however, instead (ma, invece).
--Form two lines; now one line face about turning from left to right; the other line, _instead_, turn in opposite direction.
--Form in one long line and advance; when you reach the end of the room, do not stop, _but_ turn to the left.
--You will be able to hear this drop of water fall, _if_ you remain for a moment in absolute silence.
Time: while, when, as soon as (mentre, quando, appena).
--A few of you walk about among the tables; then stop in the center of the room, _while_ the others gather round you and try to cover your eyes with their hands.
--One of you start to leave the room. _When_ you are about to cross the threshold, the others will block the way compelling you to stop.
--All of you ready! _As soon as_ I say "Go!" run to the other end of the room.
Purpose: so that, in order that (affinchè, perchè).
--One of you stand in the middle of the room; the others try to pass near him quickly _so that_ he cannot touch you.
--I am going to whisper a command: listen in perfect silence _in order that_ you may hear what I command.
Alternative: rather than (piuttostochè, anzichè).
--Those children who would _rather_ work _than_ go out of doors rise from their places.