a. 凡以表目的,慾望,夢想與計畫等名詞作主詞時,應在be動詞後接不定詞片語作主詞補語.
例:
Their plan is to change the marketing strategy to raise the competitiveness.
My goal is to pass the examination at the end of the month.
His intention was to draw everybody's attention.
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To prepare a meal for about 50 guests, start by calcualting how much food you want to prepare per guest.
不定詞片語,置於句首表示目的,以修飾之後原形動詞start起手的命令句.
=If you want to prepare a meal for about 50 guests,(you should) start by calculating how much food you want to prepare per guest.