When / your stomach ache / start?
A. When did your stomach ache start?
B. When your stomach ache start?
C. When your stomach ache started?

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Conditional Sentences Type 0, 1 and 2Will, Be going to, Present ContinuousPre-intermediateAuxiliary VerbsModals of AdvisabilityThings in EnglishConjunctions in Complex SentencesQuantifiers / Prepositions of Time and Comparative AdjectivesPhrase and ClausePrepositions of Time and PlaceOther quiz:
Prepositions › View What type of verb is the underlined word? Gale and Katniss were best friends.
A. Helping Verb
B. Linking Verb
C. Action Verb
Grammar › View
Only a few sounds produced by insects are heard by humans ___ most of the sounds are pitched either too low or too high.
(A) in spite of
(B) because
(C) as a result of
(D) instead of
Tenses › ViewHe started doing his homework 4 hours ago. He is still doing the homework.
He _____________ his homework since 4 hours ago..
A. has been doing
B. does
C. did
D. will do
Tenses › View
I’ll return Bob’s pen to him the next time I ……………… him.
A. see
B. will see
C. will have seen
D. have seen