# 1เลือกประเภทWhich sentence is in the present perfect continuous tense?She is reading a book.She has been reading a book.She read a book.She will read a book.
# 2เลือกประเภทWhat is the correct present perfect continuous form of "They (study) for hours"?They have been studying for hours.They are studying for hours.They have studied for hours.They will have studied for hours.
# 3เลือกประเภทChoose the sentence that correctly uses the present perfect continuous tense.He has been working here since 2015.He works here since 2015.He has worked here since 2015.He will work here since 2015.
# 4เลือกประเภทFill in the blank: She ______ (wait) for the bus for over an hour.has been waitingwaitsis waitingwaited