When I did my homework,my father came back.这个句子对吗? 前面的did,,,一定要改成was doing吗?When I lived in the countryside,I worked for a newspaper.这样可以吗?when 的主从句时态,有什么规律吗?老师可以给我讲一下吗?
The disagreement reflects uncertainty about how effective social distancing will be and how long it will take before a covid-19 vaccine is widely available
He knows more about active volcanoes than any others.请问这话的意思是他知道关于活火山的情况比知道其他人的多。还是他知道关于活火山的情况比其他任何人知道的还多。 连系以下这句话She is more acquaintance than a friend.麻烦分析一下这两...
...2.html 这些情态动词包括 might, may, could, can, should, ought to, would, will, must 等。我知道:must 总是用于肯定句,不用于否定句和疑问句,而can则只用于否定句和疑问句,不用于肯定句(排除理论上的可能性这种特殊用法)。但是,...
Newton regarded his refutation of mechanism as an ‘absurdity’, but could find no way around it despite much effort.请问:could find no way 是什么意思?等于 could not find ways 吗?