| 词组 | am |
| 释义 | am/is/are • have/has been - I have been in Rio since May. (Not * I am*) - I am in Rio at the moment. - I am in Rio for two weeks. (this could mean 'I am in the middle of spending two weeks in Rio', or 'I will be visiting Rio soon and will stay two weeks.') |
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英语用法大全包含5463条英语用法指南，基本涵盖了全部常用英文词汇及语法点的翻译及用法，是英语学习的有利工具。