have + been +現(xiàn)在分詞,構成完成進行時。例如:
I have been studying English for ten years. 我一直在學英語,已達十年之久。
have +been +過去分詞,構成完成式被動語態(tài)。例如:
English has been taught in China for many years. 中國教英語已經(jīng)多年。
do 的用法
構成一般疑問句。例如:
Do you want to pass the CET? 你想通過大學英語測試嗎?
Did you study German? 你們學過德語嗎?
do + not 構成否定句。例如:
I do not want to be criticized. 我不想挨批評。
He doesn't like to study. 他不想學習。
n the past, many students did not know the importance of English.
過去,好多學生不知道英語的重要性。