在此期间，英语对非本族语者提出了一系列问题，如动词时态，不规则动词，书写系统，语法等等。
At the meantime, English presents a number of issues to non-native speakers, such as verb tenses, irregular verbs, writing system, syntax and so on.
若按普通英语的动词时态规则，就得用一般过去时或现在完成时。
In this case, the past or present perfect tense should be used according to the grammatical rules of common English.
过去时态的句子以及动词过去式规则与不规则变化。
封闭类词的省略、动词的时态和体以及大写规则等有其共性而又各有特点。
These writings are of both common and special features in structure, tense and aspect, and even in capitalization.
本文从法语带动词的构成特点、基本用法入手，介绍和分析了带动词在复合时态中过去分词性数配合的相关规则。
This article from the French verb forms with characteristics, starting with the basic usage, introduces and analyzes with verbs in the past participle in compound tenses of number matching rules.
中文意思：掌握现在完成时态以及不规则动词的过去时态和过去分词…
To grasp "the Present Perfect" and the Irregular verbs' past tense &past participle tense.
中文意思：掌握现在完成时态以及不规则动词的过去时态和过去分词…
To grasp "the Present Perfect" and the Irregular verbs' past tense &past participle tense.
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