有時兩個名詞雖由and連接,但習慣上被看作是一樣東西,這時動詞也用單數(shù)：
Bread and butter is enough for me．
Whisky and soda is his favourite．
Duck and peas is delicious,but eggs and bacon is better．
That cup and saucer is broken．
The wheel and axle is out of repair．
A needle and thread is all my grandmother needs．
Romeo and Juliet is a tragedy．