Answers (Main, Linking, and Helping Verbs)

MV: Main Verb
LV: Linking Verb
HP: Helping Verb

    1. The students should have studied for their test.
                                HV         HV    MV

    2. President Chirac arrived at the White House today.
                                        MV

    3. This restaurant seems quiet and relaxing.
                                    LV (= this restaurant is quiet and relaxing)

    4. The Writing Center opens everyday at 8 a.m.
                                          MV

    5. The professor has been lecturing for three hours.
                                HV    HV    MV

    6. The young nanny ought to call the child's parents and 911 in case of emergency.
                                          HV      MV

    7. You must look at both sides of the street before crossing.
              HV     MV

    8. My grandfather's beard grows so long.
                                                  LV (=my grandfather's beard is long)

    9. This country is beautiful and wealthy.
                              LV

  10. He is not coming tonight because he feels poorly.
          HV        MV                                        MV