Always keep the: not "tallest in the class", but the tallest.
试一试: Lars is ___ in the class. (the tallest / tallest / the most tall) 答案: the tallest — tall 是短单词，所以加 -est：tallest。表示第一名的词前面一定要有 the，不能省略：the tallest（不能只说 "tallest"，也不能说 "the most tall"）。
拼写：双写字母，或去掉 -e
你在比较时学过的那两个拼写变化，加 -est 之前也一样。big 和 hot 要双写最后一个字母：big → the biggest · hot → the hottest。以 -e 结尾的单词只加 -st：large → the largest · nice → the nicest。
Senfarren Tower is the biggest building in Haffenville.
July is the hottest month of the year.
This is the largest room in the house.
That was the nicest meal all week.
So it is biggest (not "bigest") and largest (not "largeest").
试一试: July is ___ month of the year. (the hottest / the hotest / the most hot) 答案: the hottest — hot 加 -est 之前要双写最后一个字母，和 big → the biggest 一样：the hottest（不是 "the hotest"）。hot 是短单词，所以要加词尾，不能说 "the most hot"。
试一试: This is ___ room in the house. (the largest / the largeest / the most large) 答案: the largest — large 本身就以不发音的 -e 结尾，所以加 -est 之前要去掉 e：the largest（不是 "the largeest"）。large 是短单词，所以要加词尾，不能说 "the most large"。
长单词：the most ...
而那些比较长的单词（两个或更多音节），比较时用 more 的，在这里就用 the most。不要加 -est。
Senfarren View Hotel is the most expensive in town.
That was the most interesting film this year.
This is the most difficult part.
Watch out: most two-beat words use the most too: the most famous, the most modern (not "the famousest"). Words ending in -y take the ending instead: the busiest, the happiest.
试一试: That was ___ film this year. (the most interesting / the interestingest / most interesting) 答案: the most interesting — interesting 是长单词，所以前面要用 the most，不能加 -est 词尾（不能说 "interestingest"）。而且要保留 the：the most interesting（不能只说 "most interesting"）。
以 -y 结尾的单词
比较时用 -ier 的那些 -y 结尾单词，在这里就用 -iest，前面加 the：happy → the happiest · easy → the easiest · busy → the busiest。
Today is the busiest day of the week.
That is the easiest question on the test.
She looks the happiest in this photo.
试一试: Today is ___ day of the week. (the busiest / the most busy / the busyest) 答案: the busiest — busy 以 -y 结尾，所以 y 变成 iest：the busiest（不是 "the busyest"，也不能说 "the most busy"，因为这种短的 -y 单词还是要加词尾）。
good, bad, far
比较级里那三个特殊单词，第一名的形式也是特殊的：good → the best，bad → the worst，far → the farthest（或 the furthest）。
Ghafridge Cafe makes the best coffee in town.
That was the worst traffic all week.
The station is the farthest (or the furthest) stop on this line.
试一试: Ghafridge Cafe makes ___ coffee in town. (the best / the goodest / the most good) 答案: the best — good 不加 -est，也不用 most，它的第一名形式是 the best。（"The goodest" 和 "the most good" 是常规规律的写法，但 good 是要单独记住的一个词。）
the 一定要保留
表示第一名的词前面永远要有 the，因为它指向唯一的那一个——一群里的第一名。要说 the tallest、the most expensive、the best。不要漏掉 the。
She is the tallest in the class.
Senfarren View Hotel is the most expensive in town.
Ghafridge Cafe makes the best coffee here.
Not "She is tallest in the class." — say "She is the tallest in the class.". 表示第一名的词前面永远要保留 the。
试一试: She is ___ in the class. (the tallest / tallest) 答案: the tallest — 表示第一名的词前面一定要保留 the：the tallest（不能只说 "tallest"）。the 指向的是一群人里站在最顶端的那一个。
试一试: Of all the cafés, this one is ___ and it has ___ cakes. (the cheapest … the most delicious / the most cheap … the deliciousest / cheapest … most delicious) 答案: the cheapest … the most delicious — cheap 是短单词 → the cheapest。delicious 是长单词 → the most delicious。两种情况前面都要有 the。单词长短决定用 -est 还是 most，但 the 一直都在。