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问题 as引导的定语从句一定缺成分吗

之前学过的定语从句都是缺少主语宾语的，今天看到一个句子：He is from the south， as we can hear from his accent.没有看出来从句缺什么成分，看网上的解释都说这是as引导的非限制性定语从句。可以有老师解答一下吗谢谢 

问题 which非限制性定语从句疑惑

请问老师：which引导的非限制性定语从句，是修饰前面整个句子吗？which做主语指代“All citrus fruits grow on trees that are evergreen”这件事，对吗？All citrus fruits grow on trees that are evergreen, which means they don't drop their leaves in the fall. 

问题 hope for sb to do sth对吗

We hope for him to win the match. 我们希望他比赛能贏。我知道英语不能说 hope sb to do sth，但加上 for 就可以了吗？

问题 主系表倒装句的规律（“主系表”变成“表系主”）

But equally important is the mental aspect.这是2024新全国卷1阅读C中的一个句子。这是一个倒装句吧？我的问题：像这样的倒装用法有什么规律吗？

问题 used to可与频度副词连用吗

...句中的often used to用得对吗？Mr Smith often used to work late in the evening. 史密斯先生过去经常工作到深夜。

问题 by oneself可以用作表语吗

...着。 She lives by herself. 她独自一个人生活。 She can mend the fridge by herself. 她能自己修理冰箱。 请问老师：by oneself 可以用作表语吗？例如： He is by himself. 他是一个人。

问题 一道涉及“主将从现”的选择题（很难）

这是一道高考英语模拟题：In such dry weather, the flowers have to be watered if they ______. A. have survived 　B. are to survive 　C. would survive 　D. will survive答案为 D 为什么？不应该主将从现么？

问题 形容词可以修饰形容词吗(如red hot)

看到这样一个奇怪的句子：The handle was red hot. 这把手很烫手。这里的 red hot 是属于形容词修饰形容词吗？

问题 这是 totalling 连系动词的-ing形式作定语吗

请问下面这句话中 totalling 是连系动词加 ing 作定语修饰 losses 吗?The group had losses totalling 3 million this year. 该集团今年总计亏损300万美元。

问题 or which 的用法的疑问

In the past hundred years,there have been frequent natural disasters worldwide,such as floods,droughts,typhoons,earthquakes,landslides,forest fires,or which  some are made worse or even caused by human activities这里的or which是打字错误吗，如果不是，or which 是什么用法呢？...

问题 宾语补足语以及介词后面接状语从句的问题

句子：the boy is giving his explanation for why he arrived late to  school，这里for why he arrived late to  school 是宾语补足语嘛，for这个介词后面能跟why引导的原因状语从句嘛

问题 这句话中let和made两个使役动词哪个合适？

My brother  let/made  me wash the dishes.这两个选择哪个更好？第三人称主语句中使役动词需要变单三吗？

问题 healthy food还是healthful food(健康食品)

The research group found that consumers want _________(health) food based on vegetables not meat products.请问如何填？表示“健康食品”，是用 healthy food还是healthful food？

问题 比较句中相同主语用代词指代的用法

在句 The effect was far larger for female patients than it was for male ones 中，than it was 是不是 than what it was 的省略用法呢？将 than it was 替换成 than that 可以吗？

问题 as from与from的用法区别

The new law comes into force as from midnight tomorrow. 新法律从明天零点起开始生效。句中的 as from midnight tomorrow 表示“从明天零点起开始”，查了一下词典，as from 的意思是“从……起”，而单独用 from 不是也表示“从……起”吗？那这...