[ Verb Ability ]
Which sentence correctly uses ‘be able to’ in the present perfect tense?
A. I have been able to complete the task.
B. I am able to complete the task.
C. I was able to complete the task.
D. I will be able to complete the task.

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Adverb of MannerIn/On/At + TimeMixed TensesPassive Voice and Relative ClausesNoun Clauses with THATVocabulary and PhrasesThe Past SimpleTenses - AuxiliariesModal Verb, Passive VoiceOrder of AdjectivesOther quiz:
Subject Verb Agreement › ViewNiether me nor my parents ___ aware of the incident.
A. would be
B. is
C. was
D. were
Modals Posibility and Probability › View
I am not sure but Charles __________ (not do) his project for next week.
A. doesn’t do
B. won’t do
C. might not do