[ Subject Verb Agreement ]
No one _____ the problems of gingivitis, a gum disease.
A. understimate
B. underestimates
Select your answer:
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Present Forms and Narrative TensesClause Markers TOEFL GrammarPresent Perfect vs Past Simple TenseModals for DeductionComparative and Superlative AdjectiveAdverbial Clauses of Reason / CausePositive and Negative ConnotationsParticiple AdjectivesPreposition of DirectionModal Verbs and ConditionalsOther quiz:
Grammar › ViewLook! Jane and her children playing happily in the garden.
A. TRUE
B. FALSE
Modals and Vocabulary › View
Which sentence indicates permission using the correct modal?
A. You may go to the park after school.
B. You have to go to the park after school.
C. You must not go to the park after school.
D. You don’t have to go to the park after school.