Herein lies a problem. Most science/technology/medicine undergraduates do not practice English composition after high-school. Then suddenly, they are faced with the prospect of writing professional sounding prose. Harder than you think, and more important than almost any other skill or transcript grade. The challenge is to improve English composition to a level where it can impress rather than put off people. Here are some ideas to get you started.
- Start early. You need time to improve English composition. And patience.
- Read standard English text on a regular basis - Wall Street Journal, New York Times, Time Magazine. They are all available online.
- Start writing. Put in genuine effort in writing email, start writing a blog, volunteer for your college newspaper, etc.
- Take a class. Try to find out if English composition is offered in some faculty of your university. Some faculties offer specific classes in technical/business writing.
- Converse with people who have a better command over the language than you do: it rubs on.
- A book that I highly recommend (from personal experience): The Technical Writer's Handbook by Matt Young.