She ___ (visit) the museum already., has visited, have visited, visited, visits, They ___ (not finish) their project yet., hasn't finished, haven't finished, didn't finish, don't finish, ___ you ever ___ (be) to a science fair?, Have be, Has be, Have been, Has been, He ___ (not read) the book on biology., hasn't read, haven't read, didn't read, doesn't read, We ___ (complete) the experiment successfully., have completed, has completed, completed, completes, The students ___ (not understand) the concept yet., hasn't understood, haven't understood, didn't understand, don't understand, ___ she ___ (design) the new robot?, Has design, Have design, Has designed, Have designed, I ___ (not see) the latest technology exhibit., hasn't seen, haven't seen, didn't see, don't see, They ___ (develop) a new app for learning., have developed, has developed, developed, develops, The teacher ___ (not explain) the topic clearly., hasn't explained, haven't explained, didn't explain, doesn't explain, When we use Present Perfect, we refer to an action that started in the past and continues in the present., Yes, No, When we use Present Perfect, we are specific about the time in the past., Yes, No.

Present Perfect Check

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