underline the modal verbs used in each sentence and identify the concept it expresses. write the concept in space provide before each number. 1.medical expert can create the vaccine against the virus?2. could you stay at home to avoid the serious spread of covid19 virus? 3.will you go out with me tomorrow? 4.all teachers must wear face mask all the time. 5.you shall not go out side without important business. 6.we should wash our hand before and after taking our meal. 7.the pandimec may last five years. 8.joel might wear face mask and faceshield at the same time. 9.we can stop the spread of this virus together. 10.he could finish his college degree with flying colors. ​