Después de  muchas redacciones corregidas, he visto que muchos errores vienen dados por signos de puntuación. Hacer un buen uso de ellos ayudará a enteder que es lo que estamos queriendo decir y muchas más frases tendrán sentido.

Here you are going to read an extract from the Cambridge Learner's Dictionary about punctuation:

1. CAPITAL LETTER:
      a) the first letter of a sentence: Football is very popular in Britain.
      b) for countries, nationalities, languages, religions, names of people, places, events, organisations, trademarks, days, months, titles: Portugal, Africa...
      c) for titles of books, films...: Matrix.
      d) for abbreviations: AVE, AIDS...

2. FULL STOP:
      a) the end of a sentence: I'm going for a walk.
      b) sometimes after an abbreviation: Mr. Potter ,  Dr. White
     
3. COMMA:
      a) between items in a list: I need some peas, butter, sugar and eggs.
      b) to show a pause in a long sentence: They didn't want to eat before I'd arrive, but I was an hour late.
      c) when you want to add extra information: The woman, who I'd met last week, waved as she went past.

4. APOSTROPHE:
      a) for missing letters: don't, I'll, it's...
      b) for possessives: Paul's bike.
      c) Note: words ending in S don't need another S added: James' house

5. HYPHEN:
      a) to join two words together: blue-black