八年级上册英语第六单元的单词数量可以根据不同版本和编排方式而有所不同。

以人教版为例，八年级上册英语第六单元共有30个单词。具体包括：

by now

because of

a little bit

in the future

just like

fall off

get up

go to school

sleep late

come over

study for a test

have a good day

go to work

get home

cook dinner

do one’s homework

go to bed

all the time

only

no more

until

as soon as possible

on one’s way to school

take a walk

although

care about

try one’s best to do sth。

to be honest

instead of doing sth。

take care of sb。 / sth。

这些单词都是为了帮助学生掌握基本的英语语言知识和技能，如阅读、写作、听力和口语表达等。同时，这些单词也是为了帮助学生了解英语国家的文化、历史和社会等方面的知识。