english grammer

a. Susan unpacked her suitcase and took out her clothes.

b. He was so weak that it was impossible for him to go to work.

c. Some people think that 13 is an unlucky number.

d. The cooking oil was tested and found to be unpure.

e. We usually refer to a non - living thing as 'it'.

f. Salim was so nervous that he answered the questions incorrectly.

In a, unpacked = un + packed

In b, impossible = im + possible

In c, unlucky = un + lucky

In d, unpure = un + pure

In e, non - living = non + living

In f, incorrectly = in + correctly