Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
accuse：普通用词，正式或非正式场合，私人或法律上均可用。被指控的情节可轻可重。常与of连用。
charge：常与accuse换用，但charge多指较严重的错误或罪行，而且往往向法庭提出正式起诉。
2.The president, who has enjoyed almost unchallenged power for more than 20 years, was speaking as violent demonstrations against unemployment and falling living standards escalated and reached the centre of the capital Tunis.
这句话的主干是：The president was speaking。who has enjoyed almost unchallenged power for more than 20 years是定语从句，修饰president。as demonstrations escalated and reached是时间状语从句。against unemployment and falling living standards是介词短语做后置定语，修饰demonstrations。
