Agora, leia as seguintes frases e complete-as, em seu caderno, com a opção mais adequada.
a ) You must respect the law of the countries when you are traveling abroad. And you
mustn’t disrespect the local customs and traditions.
• Must is used to express (an obligation/a possibility).
• Mustn’t (must not) is used to express (an option/a prohibition).
b ) If Sandra wants travel to England, she must learn English to communicate with native speakers.
• The modal verb must is used (before/after) the subject and (before/after) the
main verb.
c ) Carlos must participate in the study group to improve his English.
•In this sentence, the modal verb must could be substituted for (have to/has to).
d ) If you want to learn, you mustn’t talk during classes. Pay attention to the teacher.
•In this sentence, the modal verb mustn’t could be substituted for (can’t/should).