We all have an inclination to make mistakes when we are tired.
疲れるとだれでも間違いをしがちになる
We all make mistakes.
((略式))だれにでも間違いはある（◆失敗した者への慰め）
We approximated the annual cost at [to be] $1,000,000.
年間のコストを約百万ドルと見積もった
We are agreed that more can be done.
もっとできると一致して思う
We are hopeful of his success [succeeding].＝We are hopeful that he will succeed.
私たちは彼が成功するものと期待している
We are just as guilty as them.
我々も彼らとまったく同罪だ
We both [Both of us] want to go.
２人とも行きたい（◆Both we .... の語順は((古))）
We can hardly conceive what this rice revolution means to them.
このコメの品種改良が彼らにとって何を意味するものかほとんど見当がつかない
We can't (even) begin to understand how difficult this time is for you.
きみが今どんなに辛いか想像もできない
We can't be too cautious.
いくら用心してもしすぎることはない
