[ Grammar ]
What is the helping verb in the sentence: “She has been studying all night.”
A. She
B. has been
C. been studying
Random Topics:
Verbs: Will & Going toAcademic VocabularyModal Verbs & Reflexive PronounsBe Going To vs. WillPassive Modals in Different TensesSubordinate ConjunctionsModal VerbsPresent Perfect Continuous TenseQuantifiers & Modal VerbsPresent and Past TensesOther quiz:
Conditionals Type I › View________ you don’t slow down, we are going to crash!
A. If
B. Unless
Grammar › View
What is the correct contraction for the following word pair?
A. couldn’t
B. could’nt
C. could’not
D. couldnot
The percentage of cats ___ risen sharply.
A. have
B. has
Vocabulary › View
fossil fuel; a flammable gas that occurs naturally underground
A. coal
B. oil
C. natural gas
D. nuclear energy
E. renewable resource