If you want to remember how to use phrasal verbs with verbs like keep, try and work, just think about the difficult process of losing weight! (The definitions of the phrasal verbs in dark letters are written at the end of the article.) Firstly, you must decide how much weight to lose- even trying to lose a few kilos can be difficult. You must also make a plan to eat only healthy food. More importantly you must keep to your plan, instead of stopping the diet for a weekend to go out drinking with your mates!  With fattening or sugary food like crisps and chocolate, it’s a good idea to keep them out of your house so they aren’t there to tempt you. However, this can be difficult if you have children who keep on bringing bad food home!  Keeping away from fast-food restaurants can also help you to lose weight.
 In addition to eating healthily, you will need to exercise to lose weight. Working out in a gym can be helpful, especially if you keep at it for more than one week! You could also go running with a healthy friend, but it may be difficult to keep up with them if they move very quickly. You could also try out other kinds of exercise such as swimming or bicycling to find out which you like the best. 
 You may be working on losing weight for a long time, but don’t lose hope! If you keep working, you will be able to happily try on new clothes in the shops in a much smaller size!

DEFINITIONS:
try to- (testing your ability to)
keep to- (not stop)
keep out- (to forbid something to enter)
keep on- (continue to do something that is annoying)
keep away from- (to avoid/to stay away from something that is dangerous or bad for you)
work out- (exercising)
keep at- (continue to do something that is challenging)
keep up with- (to move at the same speed as someone or something else)
try out- (to test something when you are not sure of the result)
work on- (to work to solve a long or difficult problem)
try on- (to put on clothes in a store to see if you like them before buying them)