含有英语字母ay的单词及其例句如下：
lay
例句：I'll lay you any money you like he won't come. 我看他不来了，你愿意赌多少钱我都奉陪。
may
例句：His book explains the theory for the lay public. 他的书为大众阐明了这个理论。
way
例句：The fish lay thousands of eggs.
say
例句：He said he would go to the park tomorrow.
day
例句：We talked about our plans for the day.
may
例句：May I ask you a question？
play
例句：They are playing football in the park.
bay
例句：The rescue helicopter made another sweep over the bay.
player
例句：He is a great basketball player.
stay
例句：I stayed at home last night.
gray
例句：The sky was gray and overcast.
always
例句：She always arrives late.
relay
例句：The relay team ran the baton around the track.
hay
例句：They gathered hay from the fields.
clay
例句：The potter shaped the clay into a vase.
delay
例句：The train was delayed due to bad weather.
display
例句：The store displayed the latest fashion trends.
joy
例句：She felt an overwhelming joy when she saw her child.
yacht
例句：A beautiful yacht is sailing on the sea.
yarn
例句：She used the soft yarn to knit a sweater.
yoke
例句：The farmer yoked the oxen to the plow.
这些例句展示了ay字母在不同单词中的多种用法，包括名词、动词和形容词等。希望这些例子能帮助你更好地理解和学习含有ay的英语单词。