[ Perfect Verb Tenses ]
Last month, Rohan and Emma were working on a project when YAZAN noticed that one of the machines failed to measure the migration patterns. Can you identify the tense used in this sentence?
A. Past perfect tense
B. Present perfect tense
C. Future perfect tense
D. Past tense

Random Topics:
Passive ModalsPronouns and AdverbsPresent Simple PassiveRoot WordTOEFL GrammarModal and Phrasal VerbsGrammar and VocabulariesInfinitive and GerundsAuxiliary Verbs (be, do, have)Employment VocabularyOther quiz:
Verb Tenses › ViewWhat verb tense is the sentence below?
My friend went on vacation to Florida.
A. past
B. present
C. future
D. it depends
Grammar › View
Earth is located ______ Venus and Mars.
A. near
B. above
C. below
D. between
Conjunctions › ViewWhat conjunction introduces a reason? “___ it was late, we decided to call it a day.”
A. Since
B. Although
C. If
Idioms › View
To “veg out” means to ___.
a. get angry
b. get excited
c. relax
