Uso De Contraccciones En Ingles

El uso de las contracciones es frecuente en inglés, tanto para respuestas cortas (no, I don´t) como para algunos verbos (to be, verbos auxiliares, modales). Es informal.
Una contracción es la formaacortada de una palabra o una combinación de palabras, a menudo usada cuando no queremos usar la forma completa. En estas formas cortas, las letras que faltan son substituidas por un apóstrofe (').En el inglés hablado e informal es muy común usar las formas contraídas del verbo "ser " y otros verbos auxiliares (tener, modals, etc.) Ya que éstos son usados en contextos más informales, deberíanser evitados en el inglés formal escrito.
  | I | You, We, They | He, She, It |
Do | don't | don't | doesn't |
Did | didn't | didn't | didn't |
Am | 'm (not) | - | - |
Is | - | - | 's -isn't |
Are | - | 're - aren't | - |
Was | wasn't | - | wasn't |
Were | - | weren't | - |
Have | 've - haven't | 've - haven't | - |
Has | - | - | 's - hasn't |
Had | 'd - hadn't | 'd -hadn't | 'd - hadn't |
Will | 'll - won't | 'll - won't | 'll - won't |
Would | 'd - wouldn't | 'd - wouldn't | 'd - wouldn't |
Can | can't | can't | can't |
Could | couldn't | couldn't | couldn't|
Must | mustn't | mustn't | mustn't |
Should | shouldn't | shouldn't | shouldn't |
Ought to | oughtn't to | oughtn't to | oughtn't to |
Am, is, are; was, were
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I'm not in the mood for dancing.
No estoy de humor para bailar.
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Tom's the boy on the left.
Tom es el chico de la izquierda.
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Sarah isn't feeling well at the moment.
Sarah no se siente bien en estemomento.
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We're living in Manchester.
Estamos viviendo en machester.
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The Joneses aren't...