Did you know there are 12 basic verb tenses in English? We conjugate
(form) verbs into present, past, and
future, but we further divide them
into categories like simple,
continuous, perfect, and past
continuous. Write the correct letter to
match each sentence with its verb
tense:
1. I did my homework
2. I was doing my homework
3. I have done my homework
4. I have been doing my
homework
A. Past simple
B. Past perfect
C. Past continuous
D. Past perfect continuous

The institute of international research is holding its annual convention. this year more than 500 scholars have been invited to hear research reports on many timely topics. approximately 250 big name scientists will be winging their way to washington, d.c. how can the underlined sentence be revised so that it fits the tone of the passage? a) approximately 250 people will be in washington, d.c. b) approximately 250 bigwigs will be flying to washington, d.c. c) approximately 250 science people will be going to washington, d.c. d) approximately 250 well-known scientists will be arriving in washington, d.c.