问题
选择题
We’re leaving at six o’clock, and hope _______ most of the journey by lunch time.
A．to do
B．to have done
C．to make
D．to have made
答案
答案：B
不定式的完成式用来表示这个动作发生在谓语动作之前，或是表示该动作已完成。此题中的不定式的完成式表示的正是该动作的完成，因此这句话可改写为:We’re leaving at six o’clock,and hope that we will have done most of the journey by lunch time.