Some nouns which are uncountable in English, and are therefore only used in the singular, are countable in other languages. These are words to look out for, especially when you are writing.Here is a list of some easy to confuse nouns which are normally uncountable in English:
accommodation, advice, baggage, bread, clothing, equipment, feedback, furniture, garbage, information, knowledge, luggage, money, news, pasta, milk, progress, research, traffic, training, travel, work
So it's 'she did research on cancer' not 'she did researches on cancer'.
Note, however, that in a sentence like 'she wrote several studies on cancer' a countable noun is used.
In order to make uncountable words countable, you need to add 'a piece of' ('a piece of advice', 'a piece of furniture'). There are sometimes other possibilities:an item of furniture, an amount of money, a snippet of news, a loaf of bread, a session of training
