The verb 'help' takes to-infinitives and bare infinitives but bare infinitives are said to be the most common in casual text; as also used in this example sentence.
英語を学習する上で不可欠な、不規則動詞の活用。
Conjugation of irregular verbs - essential for those learning English.
動詞には目的語をとらない自動詞と、目的語をとる他動詞があります。
With verbs there are intransitive verbs that don't take an object, and transitive verbs that do take an object.
完全自動詞は補語も目的語もとらない。
A complete intransitive verb takes neither complement nor object.
進行形の文では、動詞のing形、つまり現在分詞となります。
In a progressive tense sentence it becomes the -ing form verb, that is the present participle.
canは助動詞ですので、疑問文では文頭に持ってきます。
'can' is an auxiliary verb, so in question sentences it is brought to the start of the phrase.
この文は現在完了形です。haveは動詞ではなく、助動詞。
This sentence is in the present perfect. 'have' is not a verb, but an auxiliary verb.
英語には8つの主な品詞があります: 名詞、動詞、形容詞、副詞、代名詞、前置詞、接続詞そして感嘆詞。
In English there are eight main parts of speech: noun, verb, adjective, adverb, pronoun, preposition, conjunction and finally interjection.