A contraction means to make smaller. "They" and "Have" are already as small as they can get.
If you meant to say, "They are" and "Have not", then the contracted form of those words is "They're" and "Haven't", respectively.
The contraction for "they have" is "they've."
Didn't is a contraction of the words "did" and "not". There is no 'contraction' for this word.
"I'll" is a contraction of the words "I will."
The contraction for the words would not: wouldn't
The homophone is here's. It is a contraction of the words "here is."
The contraction "won't" is made by combining the words "will" and "not".
There is no contraction for the words did you.
contraction of the words you will: you'll
There is no contraction for the words "did you".
Haven't is the contraction of have not.
Didn't is a contraction of the words "did" and "not". There is no 'contraction' for this word.
contraction made in the words you will: you'll
Contraction word made from the words they and are is they're.
contraction made from the two words you will: you'll
Contraction word for she will: she'll
Shouldn't
Contractions are formed when two words are combined to create a shorter word. Examples would be "don't" which is a contraction of the words "do" and "not," the word "can't" which is a contraction of the words "can" and "not," and the word "isn't" which is a contraction of the words "is" and "not." Contractions are considered informal language.
Let's is the contraction of the two words 'Let us'