Every sentence has one grammar mistake. Sets 1-2: click the wrong word and type the fix, then press Enter. Sets 3-4: rewrite the sentence correctly and press Enter.
Set:
Click mode
Exercise 1: wrong was / were
Click the wrong word, type the correct form, then press Enter.
Set:
0/ 10
1
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Correct form:
2
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3
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4
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5
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10
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Correct form:
+ Affirmative
Subjectwas / wereverb-ing.
I was working. · She was reading. · They were playing.
− Negative
Subjectwasn't / weren'tverb-ing.
I wasn't working. · She wasn't reading. · They weren't playing.
? Question
Was / Weresubjectverb-ing?
Was I working? · Was she reading? · Were they playing?
was vs. were: subject reference
Subject
+
−
?
I
was working
wasn't working
Was I working?
He / She / It ★
was working
wasn't working
Was he working?
You / We / They
were working
weren't working
Were you working?
★ Common mistakes: Never use didn't with continuous, and don't mix was/were. They weren't watching ✅ They wasn't watching ❌ She was reading ✅ She were reading ❌
when & while. Use Past Continuous for the action in progress
Interrupted action (when)
✗ I cooked when the phone rang.
✓ I was cooking when the phone rang.
Parallel actions (while)
✗ While she read, he was cooking.
✓ While she was reading, he was cooking.
Time expressions
at 8 o'clockat that timethis time yesterdaywhenwhileall morningall eveningall nightall day long