1.month是可数名词,基本意思是“月”“月份”,还可指“一个月”,大约四个星期的时间。
2.表示“在某月份”时常用介词in,但当month前有every, each, next, any, all, last, this, that等修饰时,介词in一般要省略。
3.month是指时间的可数名词,而一年中每月份的名称是专用名称,第一个字母要大写。
4.表示“在…个月(时间)内”时,介词用within或in,不过,在美国口语中in还有“在…(个月)时间后”的意思。
5.month用作定语从句的先行词时,关系词that〔when〕常省略。
6.当以现在为时间参照点时, next month前不带冠词; 当以过去某时间为时间参照点时, next month前既可带定冠词,也可不带定冠词。

February is the second month of the year.二月是一年中的第二个月份。
He will be back before the month is out.他将在月底前回来。
He was born in the month of December.他生于12月。
The wholesale coffee price in March was a little higher than in the same month of last year.3月份咖啡的批发价比去年同月稍高一点。
How many days are there in a month?一个月有多少天?
Sales are very satisfactory this month.本月销售情况令人十分满意。
We had an underground nuclear test last month.上月我们进行了一次地下核试验。
His book,A Guide to Poultry Keeping, is to be published next month.他的《家禽饲养手册》下个月就要出版了。
He called for a meeting next month.他要求下月开个会。
He came again the next month.第二个月他又来了。
I could meet the same people of the same pitch once a month.我每个月都能看到一次那同一场地的同一伙人。
The year is divided into 12 months.一年分为12个月。
The baby was two months premature.这婴儿早产了两个月。
She has been pregnant for eight months.她怀孕八个月了。
I'll finish the work in a month.我一个月后将结束这项工作。
We were in Japan the month we had the great flood.我们在日本的那个月发了大洪水。

next month, following month
这两个短语都可译为“下月”,其区别是：next month可指以现在为时间参照点,也可指以过去某时间为参照点; 而following month仅指以过去某时间为参照点。在直接引语改为间接引语时, next month通常改为following month。例如:
A rebellion broke out the following month.第二月便爆发了起义。
He said he would go to town the following month.他说他将于下个月去镇上。

公司提供了一个为期三个月的培训课程。
［误］  The company provides a three months training course.
［正］  The company provides a three-month training course.
［析］  量度名词在用于复合形容词中时,要用单数形式。

［词源］  ＜古英语monath (月)