We use “able” especially in the structure be able + infinitive. This often has the same meaning as can. There is a negative form...

Discourse means ‘pieces of language longer than a sentence’. Some words and expressions are used to show how discourse is constructed. They can...

meanings and use It is difficult to learn to use prepositions correctly in a foreign language. Most English prepositions have several different...

This is a list of a few expressions which often cause problems. For other preposition + noun combinations, see a good dictionary.at the cinema; at...