Fill in the Blanks Past Modals.Online version Modal verbs in the past, also known as modal preterite or modal past, are used to express modalities like possibility, necessity, obligation, or permission in the past. In English, the modal verbs "could," "might," "should," and "would" are typically used to convey these modal meanings in the past tense. *Complete the following sentences by selecting the right choices. by Leticia Moreno 1 might would could has should have She studied harder for the exam . 2 have should has could would might We left earlier to avoid the traffic . 3 has could should would have might He forgotten to lock the door before leaving . 4 would might have should could has They finished the project on time if they had worked together . 5 should might has have could would I helped you with your homework if you had asked . 6 could might have would should has She listened to her parents' advice before making that decision .