1.assurance的基本意思是“保证,担保,确信”,常与介词about, of等连用,也可接that引起的同位语从句,从句中谓语动词可用虚拟式。
2.assurance还可作对自己能力、力量、方法等的“把握,自信”解,是不可数名词。

She gave repeated assurances of her loyalty.她反复保证她的忠诚。
He gave us the assurance that he would offer us more support.他向我们保证,将给我们更多支持。
The young teacher lacked assurance in front of his class.这位青年教师在学生面前缺少自信心。
He has a life assurance.他投保了人寿保险。

assurance, insurance
参见insurance条。

［同义词］   certainty, confidence, promise