求翻译：1.情态动词的特点：情态动词是助动词，其后面接动词原形，即不带to的不定式，因为是助动词，所以可以借助它来构成疑问句和否定句。是什么意思？

A modal verb features: modal verb is an auxiliary verb, followed by the infinitive, that is not to-infinitive because it is an auxiliary verb, can make use of it to form questions and negative sentences.

1.The term feelings feelings of characteristics: the verb is the verb, and its back to its original state, i.e. , the verb without to uncertainty, because the verb is to help, so you can use it to form a word and sentence negative.

1. modal verb characteristic: The modal verb is an auxiliary verb, its behind meets the verb primary form, namely does not have to infinitive, because is the auxiliary verb, therefore may draw support from it to constitute the interrogative sentence and the negative sentence.

1. characteristics of modal verbs: modal verbs are verbs, followed by Verb Conjugator, the infinitive without to, because it is the auxiliary verb, you can rely on it to pose questions and negative sentences.

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