1) 代詞each和由every, some, no, any等構成的複合代詞作主語,或主語中含有each, every, 謂語需用單數。
each of us has a tape-recorder.
there is something wrong with my watch.
2) 當主語是一本書或一條格言時,謂語動詞常用單數。
the arabian night is a book known to lovers of english.
<<天方夜譚>>是英語愛好者熟悉的一本好書。
3) 表示金錢,時間,價格或度量衡的複合名詞作主語 時,通常把這些名詞看作一個整體,謂語一般用單數。(用複數也可,意思不變。)
three weeks was allowed for making the necessary preparations.
ten yuan is enough.