Cover of the textbook New Challenges 1 - Student's Book

The key answer of exercise 4

The key to exercise solutions in chapter 16 - Space Station for the textbook New Challenges 1 - Student's Book with authors Michael Harris, Amanda Maris and David Mower from Pearson Education

Question

Write the past forms.

Answer

  • am - was
  • is - was
  • are - were
  • isn't - wasn't
  • aren't - weren't