English grammar common mistakes | using time words The effects will only be seen over a long duration . [incorrect] The effects will only be seen over a long period of time. [correct] Managers are expected to work for a long time . [incorrect] Manageres are expected to work long hours . [correct] We use hours to talk about the time during the day or week when something usually happens, especially the time when someone works or when something is open: working hours , office hours , opening hours Most nannies work long hours for low pay . [=they work many hours a day] We use period or period of time to talk about a particular length of time: Sales rose by 20% over a six month period / over a period of six months . Sportsmen can earn a lot of money, but only for a relatively short period of time . We use duration in formal writing to talk about how long something lasts: Make sure that your visa is valid for the duration of your stay . The timing of some

English grammar | confusing nouns Changes to the exam format could have a serious influence on candidates. [incorrect] Changes to the exam format could have a serious effect on candidates. [correct] It is difficult to assess the impact of the disaster on tourism. It is difficult to assess the extent of the disaster on tourism. An influence is something which causes people to think or behave in a different way: We need to learn more about the influence of violent computer games on young people . Our experiences have a huge influence on our personality . An effect is what happens to someone or something as a result of something else: Research has shown the harmful effects of stress on mothers and unborn babies . The new resort has had a beneficial effect on local businesses . [not effect to ] * Remember, effect is a noun. The verb form is affect: Homes on the west coast were seriously affected by the hurricane . An impact is a powerful effect of something,

As a tourist, you should show respect for local behaviour . [incorrect] As a tourist, you should show respect for local customs . [correct] They encourage the practice of teachers reading aloud to young children. [correct] They encourage the habit of teachers reading aloud to young children. [incorrect] A habit is something a person does regularly in a particular way as part of their everyday life, often without thinking about it: After a while, seperating rubbish for recycling just becomes a habit . People's habits have changed. Families no longer eat meals together . A custom is something people in a particular country or of a particular religious or ethnic group do because it has been part of their culture or way of life for many years: He studied Maori culture and customs . The custom of decorat ing a tree at Christmas goes back hundreds of years . A practice is a method of doing something which is usually used, especially in a particular country,