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2. Mathematical Olympiads for Elementary and Middle Schools

   en.wikipedia.org/wiki/Mathematical_Olympiads_for...

   There are two divisions, Elementary and Middle School. Elementary level problems are for grades 4-6 and Middle School level problems are for grades 7-8, though 4-6 graders may participate in Middle School problems. Hundreds of thousands of students participate annually in MOEMS events. MOEMS plans soon to develop an online teacher training program.

3. Auxiliary verb - Wikipedia

   en.wikipedia.org/wiki/Auxiliary_verb

   An auxiliary verb (abbreviated aux) is a verb that adds functional or grammatical meaning to the clause in which it occurs, so as to express tense, aspect, modality, voice, emphasis, etc. Auxiliary verbs usually accompany an infinitive verb or a participle, which respectively provide the main semantic content of the clause. [1]

4. English auxiliary verbs - Wikipedia

   en.wikipedia.org/wiki/English_auxiliary_verbs

   The first English grammar, Bref Grammar for English by William Bullokar, published in 1586, does not use the term "auxiliary" but says: All other verbs are called verbs-neuters-un-perfect because they require the infinitive mood of another verb to express their signification of meaning perfectly: and be these, may, can, might or mought, could, would, should, must, ought, and sometimes, will ...

5. Uses of English verb forms - Wikipedia

   en.wikipedia.org/wiki/Uses_of_English_verb_forms

   The simple past or past simple, sometimes also called the preterite, consists of the bare past tense of the verb (ending in -ed for regular verbs, and formed in various ways for irregular ones, with the following spelling rules for regular verbs: verbs ending in -e add only –d to the end (e.g. live – lived, not *liveed), verbs ending in -y ...

6. Elementary mathematics - Wikipedia

   en.wikipedia.org/wiki/Elementary_mathematics

   Elementary mathematics, also known as primary or secondary school mathematics, is the study of mathematics topics that are commonly taught at the primary or secondary school levels around the world. It includes a wide range of mathematical concepts and skills, including number sense , algebra , geometry , measurement , and data analysis .

7. English verbs - Wikipedia

   en.wikipedia.org/wiki/English_verbs

   Verbs ending in a consonant plus o also typically add -es: veto → vetoes. Verbs ending in a consonant plus y add -es after changing the y to an i: cry → cries. In terms of pronunciation, the ending is pronounced as / ɪ z / after sibilants (as in lurches), as / s / after voiceless consonants other than sibilants (as in makes), and as / z ...