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Introduction to Exercise 2
Sentence with grammar mistakes

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Grammar Explanation

•  Use the simple past when you refer to an action that occurred at a specific
time in the past; for example, with phrases such as yesterday, last night, or two days ago.
  • Example: Welfare recipients did not have to work for their benefits before 1996.
•  Use the present perfect when you refer to an action that occurred at a non-specific time in the past, especially if there is a connection to the present.
  • Example: The living standard of welfare recipients has increased.
•  Use the present perfect with actions that started in the past and continue into
the present.
  • Example: Welfare recipients have had to work for their benefits since the welfare reform act was signed into law.
What You Will Do

There are numbered blanks in the following passages. When you click on the number, two choices will appear on the side. Click on the correct choice to insert it in the passage. If you click on the wrong choice, the Answer box at the bottom of the choices will tell you why your answer is wrong.
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