She began to learn painting at an early age and has a broad knowledge of traditional Chinese painting, which, combined with he active personality and perfect spoken English....这里which 前后都有逗号，是代表什么呢？还是非限制性定语从句吗？那引导什么呢？
在主句为一般过去时的句子中 as though 引导的状语从句如果用虚拟语气谓语可以不是 have done 而是 did 吗?But what else could they do on that dark winter's day when the last of
their store of grain was gone, when the trees were cut and sold, when he had
sold everything,...
...studying abroad was quite helpful to May.我分析的是：what引导主语从句，在主语从句中作talked about的宾语，但是maintaining reasonable
expectations when studying abroad这个名词短语作什么成分？也是作talked about的宾语吗？如果是，talked about不就有两...
1. Tom’s father died on May 1st, but the day before then he had looked pretty well. Tom’s father died on May 1st, the day before when he had looked pretty well.2. My uncle works on a farm, and in front of it there is a lake . My uncle works on a farm, in front of whic...
That, in turn, came amid an outbreak of restiveness among the developers who provide software to Apple users, and at whom the WWDC is ostensibly aimed.一个是who引导的限定性定语从句，at whom引导的是非限吗？
The number of times a cycle repeats itself within a period of time is its frequency.
这个句子a cycle repeats itself是定语从句吗？那先行词 the number of times在后面的定语从句怎么充当成分?
谢谢老师解惑！
...比较分句的倒装特点：He worked hard, as his brother did/worked. 从句谓语可以重复worked，也可以用did替代。He worked hard, as did his brother. 从句倒装，突出主语his brother.He worked hard, as worked his brother. 错误。worked不是操作词，不能用于比较分...