has been是什么時態(tài)?
回答
愛揚教育
2022-04-19
has been是現(xiàn)在完成時,在主語第三人稱單數(shù)情況下的一個展現(xiàn)。has been它的原型是be。
擴展資料
例句:
Only time will tell if the treatment has been successful.
只有時間才能證明這種療法是否成功。
The system has been in operation for six months.
這個系統(tǒng)已經運行六個月了。
The company has been investing in new plant and equipment.
這家公司一直在投資購置新機器和設備。