[ Tenses ]
John (study) ………………………………………… for an exam now. He (begin) ………………………………………… five hours ago. He (already, read) ………………………………………… three books.
A. is studying; has begun; has already read
B. are studying; began; have already read
C. is studying; began; has already read

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Perfect Progressive TensesTypes of Sentence StructuresHave vs. HasVerb Tenses and Sentence StructureGrammar - must & have toInterrogative PronounsGerund, Participle, Infinitive, or AppositiveQuantifiers: too many, too much & enoughTime ConjunctionsKinds of NounsOther quiz:
Mixed General Quiz › ViewThe city of Pittsburgh is best known for ___ steel.
a. is making
b. making
c. did make
Grammar: Syntax › View
Lexical items that rely on context to convey meaning. For example, in the sentence ‘You know he did it again,’ context is required to be able to understand both who ‘he’ is and what he has done.
A. modification
B. deixis
C. imperative
D. modals