--- title: A year ending in 00 is a leap year only if it divides exactly by 400… — Leap years and 29 February birthdays · tree and pragmatics description: A year ending in 00 is a leap year only if it divides exactly by 400, so 1900 and 2100 are not leap years but 2000 was. Who acts: year, Earth, 1900. A sentence of the lesson «Leap years and 29 February birthdays» of the world course of Mova's primary school with its dependency tree and the pragmatic --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/world/112-leap-years-and-29-february-birthdays/15/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [World](https://md.mova.elamur.ai/free/en/corpora/school/world/) / [Leap years and 29 February birthdays](https://md.mova.elamur.ai/free/en/corpora/school/world/112-leap-years-and-29-february-birthdays/) / 15 # Leap years and 29 February birthdays, sentence 15 A year ending in 00 is a leap year only if it divides exactly by 400, so 1900 and 2100 are not leap years but 2000 was. **Who acts:** year, Earth, 1900 · **What happens:** ending, be, divide, not be · **To what, where:** 00, leap year, leap years This is a sentence of the lesson «Leap years and 29 February birthdays» of the world course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (year, Earth, 1900), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:world:112-leap-years-and-29-february-birthdays.lesson:15 # text = A year ending in 00 is a leap year only if it divides exactly by 400, so 1900 and 2100 are not leap years but 2000 was. # source = school lesson (ours) # course = world # lesson = 112-leap-years-and-29-february-birthdays.lesson # annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×2 1 A a DET DT Definite=Ind|PronType=Art 2 det _ Agree=R5-strong|Haiku=3:det 2 year year NOUN NN Number=Sing 9 nsubj _ _ 3 ending ending VERB VBG VerbForm=Part 2 acl _ _ 4 in in ADP IN _ 5 case _ _ 5 00 00 NUM CD NumForm=Digit|NumType=Card 3 obl _ _ 6 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 9 cop _ _ 7 a a DET DT Definite=Ind|PronType=Art 9 det _ _ 8 leap leap NOUN NN Number=Sing 9 compound _ _ 9 year year NOUN NN Number=Sing 0 root _ _ 10 only only ADV RB _ 13 advmod _ Agree=R5-strong|Haiku=9:advmod 11 if if SCONJ IN _ 13 mark _ _ 12 it it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 13 nsubj _ _ 13 divides divide VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 9 advcl _ _ 14 exactly exactly ADV RB _ 16 advmod _ _ 15 by by ADP IN _ 16 case _ _ 16 400 400 NUM CD NumForm=Digit|NumType=Card 13 obl _ _ 17 , , PUNCT , _ 19 punct _ _ 18 so so ADV RB _ 19 advmod _ _ 19 1900 1900 NUM CD NumForm=Digit|NumType=Card 25 nsubj _ _ 20 and and CCONJ CC _ 21 cc _ _ 21 2100 2100 NUM CD NumForm=Digit|NumType=Card 19 conj _ _ 22 are be AUX VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 25 cop _ _ 23 not not PART RB Polarity=Neg 25 advmod _ _ 24 leap leap ADJ JJ Degree=Pos 25 amod _ _ 25 years year NOUN NNS Number=Plur 9 parataxis _ _ 26 but but CCONJ CC _ 27 cc _ _ 27 2000 2000 NUM CD NumForm=Digit|NumType=Card 9 conj _ _ 28 was be AUX VBD Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin 9 cop _ _ 29 . . PUNCT . _ 9 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **ending** | gerund | a year *not said here* | | | 00 | | | tree rules | | 2 | **is a** | present | a year | a leap year | | | | | tree rules | | 3 | **divide** *a condition, not said to happen* | present | Earth | | | | | by 400 | vn multiply-108-1 «NP V NP PP.co-theme»: agent=Agent by 400=Co-Theme | | 4 | **not** **is a** | present | 1900 | leap years | | | | | tree rules | One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree. **Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:world:112-leap-years-and-29-february-birthdays.lesson:15`. **The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×2. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence. See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/). - ← previous: [Leap years and 29 February birthdays, 14](https://md.mova.elamur.ai/free/en/corpora/school/world/112-leap-years-and-29-february-birthdays/14/) - next →: [Leap years and 29 February birthdays, 16](https://md.mova.elamur.ai/free/en/corpora/school/world/112-leap-years-and-29-february-birthdays/16/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/world/112-leap-years-and-29-february-birthdays/)