John reflects on his past actions and says, “I should have studied harder for the exam.” Which option best explains the correctness of this sentence?
A. should have studied
B. should studied
C. should have study
D. should study

Random Topics:
Personal pronouns + possessive adjectives + Introgative pronounsFirst & Second ConditionalThe First Conditional SentenceCohesive DevicesPRESENT SIMPLE vs PRESENT CONTINUOUS + QUANTSimple Compound and Complex SentencesModal Verbs for PossibilityVocabulary and ModalsGive, do and makePresent Perfect SimpleOther quiz:
Conditional Sentences › ViewHis laziness prevents him from becoming a good worker.
A. If he weren’t lazy, he would become a good worker.
B. If he hadn’t been lazy, he would have become a good worker.
C. Despite his laziness, he becomes a good worker.
D. It was his laziness that prevented him from becoming a good worker.
Adverb Clause › View
__________ you submit the assignment on time, you will receive full marks.
A. If
B. After
C. Unless
D. Because
Subject Verb Agreement › ViewThe airplane (fly / flies) high above the clouds.
A. fly
B. flies
Grammar › View
Paul: What about you?
Vanessa: Hmm, I’m in my room but I ____________ (not study).
A. are studying
B. not studying
C. ‘m not studying
