We use current COVID-19 infections to mean testing positive for SARS-CoV-2, with or without having symptoms.老师们，这里的with or without having symptoms感觉很别扭，好像它是一个独立的存在，请老师帮我解析一下这个短语的作用
...t night because I was so excited.They
were making a lot of noise, so I had to speak loudly.我感到很奇怪，1）为什么都是连词becasue前却没有逗号（，），而连词so前却有逗号（，）？2）我提问的句子，because前可否有一个逗号（，）呢？为什么？
...ust that this September, when they
pulled individual students out of class to tell them just how much they
appreciated them.
did just that this September翻译不出来啊，只感觉是：做那件事情（在这个九月），请简略解答一下怎么样翻译？
...s criticized him ( ) to admit his mistake.
A. had he begun
B. did he begin
问题1.倒装的原因就是因为否定词not在句首吗？
问题2.not until 和 until 有什么区别？感觉意思一样一样的。
问题3.英语里怎...
...hsB a month and a halfC one and half a months该题选AWhat would you like to have for breakfast?( ) and some cakes.A A half glass of milkB Half a glass of milkC Half milk该题选B请问老师half 这个词位置在哪里？好像一会有冠词一会没冠词，记得表示时间时就说 h...
...相替换吗？这是什么语法现象？I remember we went bike riding together last fall when he visited you.1.在句子里的“went bike riding”，这是什么语法现象？为什么不写成象“go swimming／fishing／shopping／camping”这样呢？2.went bike riding与went riding意思...