表示做某事的工具，a tool 后面是接不定式还是接for doing sth。见到过后接for doing sth的用法，如：This is a tool for opening tins. 这是一个开罐头的工具。句子中的 for opening tins 可以换成 to open tins 吗...
在一张试卷中有这样一组对话：—Are you going to school by bus or bike?—Sometimes by bus and sometimes by bike. 问句中的 by bus or bike 应该是 by bus or by bike 的省略形式，但问题是，英语有这样...
According to Cisco, a maker of networking gear, video accounted for 70% of global internet traffic in 2015, a share it thinks will increase to 82% by 2020.请教一下这个句子的结构和句法成分。如果是并列...
章振邦的新编高级英语语法679页：But this fault, if it be a fault, has been caused by earnest wish to give as much of Shakespeares own words as possible.1) if it be a fault 是什么意思？ 为什么...