Standard English ConventionsVery hardPresent perfect with since
Standard English Conventions practice question
The observatory ____ the comet every night since it was first spotted in March.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A. has trackedCorrect
- B. tracked
- C. tracks
- D. is tracking
Answer: A. has tracked
An action continuing from a past point to now takes the present perfect.
Why the other answers are wrong
- B. tracked
- Simple past does not reach to the present with "since".
- C. tracks
- Simple present does not fit "since March".
- D. is tracking
- Present progressive does not pair with "since".
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