Section Ⅳ Grammar & Writing
情态动词的用法
阅读下列句子，体会黑体部分的用法
1．In some countries，for example，you have to arrive on time at a party；in other countries，you don't need to.
2．Some hosts expect flowers or a small gift，but in other places，you can take things，but you needn't if you don't want to.
3．—Did the immigration people ask to see your visa?
—No.I didn't need to get a visa.
