The above should have helped to clarify these three verbs; you ought now to know how to use them; I must stop writing immediately!请问：should have helped是否要改为should help？
...rmeniaand Azerbaijan have since agreed to "disengage" from the border are now in the midst of pulling back troops from part of the border.本句改自一个英文新闻网站，请问各位老师，这样的句子是否符合语法？我理解这个句子是一个并列句，应该在are前加上an...
We are also doing the same with other vital resources not usually thought of asbeing nonrenewable such as fertile soils, groundwater and the millions of otherspecies that share the earth with us.本句中not部分是并列句还是并列表语呢？thought在这里应该是名词吧？
The conventional theory is that people yawn when bored or sleepy because yawning raises blood oxygen levels, which in turn raises alertness.whchi in turn 在这里不是否定吧？是进一步吗？
Thisis the questionabout which we've had so much discussion这句话中为什么要有个介词about？Everything that he said seemed quite reasonable这句话中为什么又没有介词了？介词什么时候，用什么时候不用？？
请问老师分词短语teaching是作定语修饰experience还是teacher？怎么判断？experience不是teaching的逻辑主语，那是不是代表分词短语修饰teacher？She isan English teacher with lots of experience teaching kindergarten
to grade 6.
One way is to teach people how to avoid catching the virus sexually through condom promotion.promotion可理解为倡导，但这个sexually我不理解，这句话从sexually到后面就不知道怎么翻译理解了，求助!
Sometimes it is potential clients who have learning to do. Some clients assume Africans cannot speak English, she sighs.请问一下亲爱的老师，第一句话是强调句吗？谓语是谁？have learning是什么意思呢