過去將來完成進(jìn)行時(shí)：(would have been doing)
表示動(dòng)作從過去某一時(shí)間開始一直延續(xù)到過去將來某一時(shí)間，期間一直有規(guī)律在進(jìn)行、不曾間斷，并且有可能繼續(xù)延續(xù)下去。
例：They said that by the end of the following month, the project would have been being worked for 3 years.
他們說到第二個(gè)月底為止，這項(xiàng)工程就已經(jīng)不停地進(jìn)行了3年了。
將來完成時(shí)(will have done)
①表示一個(gè)動(dòng)作到將來某個(gè)時(shí)間為止已經(jīng)完成，強(qiáng)調(diào)對(duì)將來那個(gè)時(shí)間產(chǎn)生的影響。
例：Pick me up at 8 o'clock,I will have had breakfast by then.
早上8點(diǎn)鐘你來接我,到時(shí)我已經(jīng)吃完早飯了.
②表示一個(gè)動(dòng)作延續(xù)到將來某個(gè)時(shí)間，并且有可能繼續(xù)延續(xù)下去。
例：The conference will have lasted a full week by the time it ends.
會(huì)議從開始到結(jié)束將持續(xù)整整一個(gè)星期。
將來完成進(jìn)行時(shí)：(will have been doing)
表示一個(gè)動(dòng)作延續(xù)到將來某個(gè)時(shí)間，期間一直有規(guī)律在進(jìn)行、不曾間斷，并且有可能繼續(xù)延續(xù)下去。
例：By the end of next month, the project will have been being worked for 3 years.
到下個(gè)月底為止，這項(xiàng)工程就已經(jīng)不停地進(jìn)行了3年了。