Comparatives: (not) as... as; so that / such that

(NOT) AS... AS
Una forma de comparar dos cosas es diciendo en qué se parecen con "AS... AS", o en qué se diferencian "(NOT) AS... AS".

• "My trainers are as trendy as yours" (My trainers are trendy / Your trainers are trendy)
• "Cristiano is not as good as Messi" (Messi is better than Cristiano)

Aquí tienes algunos ejercicios para practicar

• http://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adjectives_comparison_as_as.htm
• http://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises?02
• http://www.tinyteflteacher.co.uk/learning-english/grammar/exercises/as-as-adjectives.html

SO / SUCH

Si queremos enfatizar la cualidad expresada por un adjetivo añadiéndole una frase, utilizaremos "so ... that ..."

• "Gwyneth Paltrow is so beautiful that everybody looks at her"

Si lo que queremos enfatizar es una cualidad de un sustantivo con un adjetivo utilizaremos "such a ... that..."

• "Gwyneth Paltrow is such a beutiful actress that everybody looks at her".

Normalmente so... that y such ... that nos sirven para unir una causa y su consecuencia.

• "Gwyneth's performance was so good in Shakespeare in Love that she won an Oscar"
• "Gwyneth did such a good performance in Shakespeare in Love that she won an Oscar in 1999".

Aquí tienes algunos ejercicios para practicar:

• http://www.englishpage.com/minitutorials/sosuchexercise.htm
• http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-49749.php
• http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/177_gramchallenge11/page2.shtml
• http://www.usingenglish.com/quizzes/236.html