原句：She has a business cleaning homes and construction sites on Long Island, New York. 请教老师，这句我查语法书，cleaning homes and construction sites on Long Island 是不是不带主语和从属连词的-ing分词分句？
...rict discipline is sometimes important,but it would have an adverse impact on children’s problem-solving abilities.
这个句子中的为什么要使用would呢？如果去掉或者换成别的情态动词可不可以呢？
would除了表示will的过去式，表示意愿之外还有别的用法...
The second tack of their argument is to compare the sort of effect seen
in biology-based models of where malaria might spread with both models of and
dataon the effects direct interventionagainst the disease can have.麻烦老师帮忙分析一下句子，特别是这里面的of where, of加在这...
1， You（ must have been/ Must be） a good student when you were at school. 2， Last night I saw a boy wandering on the street. He must （have been /be）lost, I thought to myself.请问这两据分别选哪一个？如果不一样的话，为什么不一样？
Now, Cao has started
the second part of his dream to walk along the Belt and Road route. He flew
4,700 kilometers ___69___ Xi’an to Kashgar on Sept. 20, ___70___ (plan) to hike
back to Xi’an in five months.这是2022全国卷2的语法填空题。第69题填 from；第70题填 planning。
...