you'd （完整形式） thank（名词） it（复数） you（复数） fifth（缩写） remember（反义词

you'd （完整形式）you would
thank（名词）thank
it（复数）they
you（复数）you
fifth（缩写） 5th
remember（反义词）forget
today（所有格）today's
easy（反义词）hard/difficult
much（同义词）many