Hi teachers !
In the test [color=blue]“Where are my Glasses?” :: English Errors, Elementary Level # 16, there are 2 sentences :
2). Yesterday she was worried because she thought she has lost her glasses.
(a) was worried
5). She worried again because she knew that this would meaning buying a new pair.
Please explain me, when we should use to worry and when we should use to be worried, what is the difference ?