D49 ground 20181206
1）使用《牛津英语搭配词典》查“ground”，了解它作为名词表示“理由”时的常用搭配。
grounds reason for sth. 原因
①、[搭配]ADJ.
good, reasonable, sufficient, valid 正当的理由；合理的依据；足够的理由；令人信服的根据
②、[搭配]VERB + GROUNDS
have 有理由: The constable had reasonable grounds for arresting her.
警察有正当的理由逮捕她。
give (sb.) 给（某人）理由以…: His evasiveness gave grounds for the suspicion that he knew more than he was saying.
他含糊其词，让人有理由怀疑他没有把知道的都说出来。
③、[搭配]PREP.
on ... ~s 由于…原因: Permission to open a mine was denied on environmental grounds.
由于环境方面的原因，开矿被否决了。
on the ~s of 因为…原因: He resigned from his post on the grounds of ill health.
他以身体不好为理由辞职了。
~ for 导致…的原因: Drunkenness at work was sufficient grounds for instant dismissal. 工作时醉酒足可导致立即被开除。
2）翻译下面的句子：
因为英语不够好，他拒绝了邀请。
He declined the invitation on the grounds of inadequate English.
（参考翻译：He turned down the invitation on the grounds that his English was not good enough. 或者On the grounds of inadequate English, he declined the invitation. ）
3）结合自己的生活、学习、工作、兴趣等，想象在什么语境下会用到这个表达。先简要描述这个场景，再造句。
例子：
People buy knowledge-paying products on the ground for alleviating anxiety.
Health care professionals opposed evidence-based patient choice on the grounds that it would increase anxiety, reduce compliance and create problems for the organization.
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