moreover作副词意为“而且；此外”。多为补充说明，前面所说的及后面所补充的是并列关系，就是补充未说完的话。另外furthermore和what's more也有“而且；此外”的意思。

moreover的用法

（1）Moreover, Ramsay was no mean thinker himself.

而且拉姆齐自己也是一位出色的思想家。

（2）A talented artist, he was, moreover, a writer of some note.

他是一位有才华的艺术家，同时也是颇有名气的作家。

（3）The rent is reasonable, and moreover, the location is perfect.

这房租合理，而且地点优越.

（4）The task is difficult, and moreover, time is pressing.

任务艰巨，并且时间紧迫.

（5）Bicycling is a good exercise ; moreover, it is easy to learn.

骑自行车是一种很好的锻炼方式，并且还容易学.

furthermore的用法

进一步说明，后面与前面所要涉及的内容更近一步，是递进关系。

Furthermore, he cautioned against overplaying the potential impact of interest rate rises and further big increases to the bank reserve requirement.

此外，他还警告人们不要过分夸大加息和进一步大幅上调银行存款准备金率的潜在影响。

what's more的用法

而且；更重要的是；另外。不但补充未说完的话，而且含有递进的含义。

What's more, obstructive sleep apnea has been shown to affect the cognitive abilities and behavior of children with the condition.

不仅如此，有证据表明，阻塞性睡眠呼吸暂停综合征会影响儿童的认知能力和行为方式。

moreover的用法