to do(一般)②to be doing (進行) ③to have done(完成)。
時態包括時和態,不定式to do只殘留下了“態”,其“時”的標準是謂語動詞,不同的態表達非謂語動詞與謂語動詞發生時間的前後關係。
(1)表示動作發生在謂語之前用to have done
①We are happy to have visited so many historic places in Beijing.
在北京參觀了那麼多的名勝古蹟,我們感到很開心。
②Humans are believed to have evolved from the primate species.
人們相信,人類是由靈長類動物進化過來的。
(2)與謂語同時發生用to do 或to be doing
① I am glad to see you.
我見到你很開心。
② I want to be doing this work now.
我希望現在正處在這份工作中。
(to be doing強調正在進行,翻譯成“正在”)
(3)動作發生在謂語動作之後用to do
We plan to go to the sea this summer
to do(一般)②to be doing (進行) ③to have done(完成)。
時態包括時和態,不定式to do只殘留下了“態”,其“時”的標準是謂語動詞,不同的態表達非謂語動詞與謂語動詞發生時間的前後關係。
(1)表示動作發生在謂語之前用to have done
①We are happy to have visited so many historic places in Beijing.
在北京參觀了那麼多的名勝古蹟,我們感到很開心。
②Humans are believed to have evolved from the primate species.
人們相信,人類是由靈長類動物進化過來的。
(2)與謂語同時發生用to do 或to be doing
① I am glad to see you.
我見到你很開心。
② I want to be doing this work now.
我希望現在正處在這份工作中。
(to be doing強調正在進行,翻譯成“正在”)
(3)動作發生在謂語動作之後用to do
We plan to go to the sea this summer