I’m really tired 主句\\because I have cleaned the house ever since this morning 從句.
翻譯：我真的很累了,因?yàn)閺脑绯课揖驮诖驋叻孔?
1.ever since 的結(jié)構(gòu)：(作為連詞)=since 完成時(shí)態(tài)---- ever since +主+動(dòng)詞簡單過去式
例：I have known him ever since he was a child.
他從小我就認(rèn)識(shí)他了.
這種用法同since 差不多,不過 ever since 比 since 用得少.
再如：We have lived in Shanghai ever since we came to China.(自從我們來到中國之后就住在上海.)
2.以上所說的 ever since 作為連詞.
ever since 也可作為副詞,解釋“此后”（就一直...）
例：1）He fell ill at Christmas and has been ill ever since.
他在圣誕節(jié)生病了此后就一直不適.（has + be ill）
2）He left home last year and has been away ever since.
他去年離家走了,此后一直在外面.（has + be away）
3）He fell off his horse a week ago and has been in bed ever since.
一周前他從馬背上跌下來,從那以后就一直躺在床上.
4）He went to Turkey in 1950 and has lived there ever since.
他在1950年去土耳其,此后就一直住在那里.
3.has not been able to 這實(shí)際上就是 be able to 加上 have 罷了.所謂 be able to 就是“有可能”不是“能”（can）.如果一直,始終沒有可能就是has not been able to ,這很簡單.
如果 it has not been easy.就是“那件事一直不是輕而易舉的.”完成時(shí)態(tài)不一定都解釋為“已經(jīng)”,有時(shí)要解釋為“一直”.