moreover作副詞意為“而且；此外”。多為補充說明，前面所說的及後面所補充的是並列關系，就是補充未說完的話。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.
而且拉姆齊自己也是壹位出色的思想家。
（2）A talented artist, he was, moreover, a writer of some note.
他是壹位有才華的藝術家，同時也是頗有名氣的作家。
（3）The rent is reasonable, and moreover, the location is perfect.
這房租合理，而且地點優越.
（4）The task is difficult, and moreover, time is pressing.
任務艱巨，並且時間緊迫.
（5）Bicycling is a good exercise ; moreover, it is easy to learn.
騎自行車是壹種很好的鍛煉方式，並且還容易學.
furthermore的用法進壹步說明，後面與前面所要涉及的內容更近壹步，是遞進關系。
Furthermore, he cautioned against overplaying the potential impact of interest rate rises and further big increases to the bank reserve requirement.
此外，他還警告人們不要過分誇大加息和進壹步大幅上調銀行存款準備金率的潛在影響。
what's more的用法而且；更重要的是；另外。不但補充未說完的話，而且含有遞進的含義。
What's more, obstructive sleep apnea has been shown to affect the cognitive abilities and behavior of children with the condition.
不僅如此，有證據表明，阻塞性睡眠呼吸暫停綜合征會影響兒童的認知能力和行為方式。