le 了 at the end of a sentence with a noun predicate.

The new situation marker le 了 is used at the end of a sentence in which the predicate is a noun, a stative verb or an action verb. An action verb may be preceded by an optative or modal verb. The change-of-state le 了 is also used in shì 是 and yǒu 有 sentences.

Le 了 at the end of a sentence with a noun as the predicate.

  1. 1.Jīntiān xīngqīwǔ le.
    今天星期五了。
    Today is Friday (already). It has turned into Friday today.
The underlying statement is that time has passed and it has changed from Thursday into a new day, Friday. If le 了 is eliminated, the sentence simply announces the day of the week. Compare it with the following sentence which does not have the change-of-state le 了.

  1. 2. Jīntiān xīngqīwǔ.
    今天星期五。
    Today is Friday.
This sentence simply states the fact that 'today' is Friday.

  1. 3. Xiànzài yǐjīng shí yuè le.
    现在已经十月了。
    It is already October now. /It has already become October now.
This sentence shows that time has passed and that it has progressed into a new month, October. Compare it with the following sentence which does not have the change-of-state le 了.

  1. 4. Xiànzài shì shí yuè.
    现在是十月。
    It is October.
This sentence simply announces the fact that the month in question is October.