choose the grammar structure of present perfect
A. subject , have +simple past verb
B. subject+have-has verb+past participle verb
C. subject+past participle verb +have has
D. subject + has +past participle ver

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Future Perfect TensePresent Perfect Tense and Simple Past TenseModals and ResponsibilitiesAll, Both, Neither, None, EitherSecond ConditionalsAdverb ClauseSentence TypesHow many / How much - Is there / Are thereIndefinite ArticleInfinitive or GerundOther quiz:
Grammar › ViewThe actor and actress (smile/smiles) and (wave/waves) at the crowd.
A. smile and wave
B. smiles and waves
C. smile and waves
D. smiles and wave
Grammar › View
It’s not necessary to go to school on Saturdays.
You ………………to school on Saturdays.
_
A. shouldn’t go
B. have to go
C. mustn’t go
D. don’t have to go
Grammar › ViewRohan is the ———— boy among them.
A. intelligent
B. more intelligent
C. most intelligent
D. None of the above
Vocabulary and Grammar › View
. What is the author’s main argument in Is Our Gain Also Our Loss?
A. Technology has created as many problems as it has solved.
B. Modern technology has made our lives significantly easier.
C. The world was better before the invention of smartphones.
D. Technology has made education easier but personal connections weaker.
