问题一：八十的英文 eighty
问题二：八十大寿的英文怎么写 The eightieth birthday
问题三：百分之八十的英文写法是什么？ eighty per cent
问题四：十四、四十、八十，分别用英语怎么写 fourteen
问题五：第一到第二十用英语怎么写？三十、四十、五十、六十、七十、八十、九十、一百用英语怎么写？ first
second
third
fourth
fifth
sixth
seventh
eighth
ninth
tenth
eleventh
twelveth
thirteenth
fourteenth
fifteenth
sixteenth
seventeenth
eighteenth
nineteenth
twentieth
one
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteenth
twenty
问题六：英语单词六十到八十的怎么读 用带发音的词典软件或者网站，读一下这些单词：
sixty
seventy
eighty
one
two
three
four
five
six
seven
eight
nine
然后把它们组合起来。
60就是sixty
70 seventy
80 eighty
61 sixty-one
62 sixty-two
73 seventy-three
74 seventy-four
…… ……