は, が, を, に, で, と, も, の on one sheet — the eight words that hold every Japanese sentence together.
で (means / place of action) means で V / place で V (action)
Marks the means/method, or the place where an action occurs.
ペンで 書きます。 I write with a pen.
と (with / and) N1 と N2 / person と V
Joins nouns ('and'), or marks a person you do an action with.
ねこと いぬが います。 There are a cat and a dog.
も (also) N も + predicate (replaces は / が / を)
Means 'also' / 'too'. Replaces は or を to express addition.
わたしも 学生です。 I am a student, too.
の (possessive / modifier) N1 の N2
Connects two nouns; expresses possession or modification.
これは わたしの 本です。 This is my book.