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
(b) thought
(c) has
5). She worried again because she knew that this would meaning buying a new pair.
(a) worried
(b) knew
(c) meaning
Please explain me, when we should use to worry and when we should use to be worried, what is the difference ?