As one of the most important and confusing grammatical tenses in high-school English, present perfect tense brings about much perplexity to both teachers and students.
现在完成时态是中学英语语法中的重点和难点，经常给师生带来困惑。
Ancient Chinese was extremely succinct, having no verb tense or other complex grammatical construction.
古代汉语是尤其简洁的，没有动词语态和其他的复杂语法结构。
"Present Past Tense" is a seemingly familiar grammatical rule, which however does not exist in real life.
“现在过去时”是一个看似熟悉，但却又并不实际存在的语法规则。
At the early stage of the study of EST, people mainly focus on superficial language phenomena such as word formation, grammatical structure, tense, voice, etc.
科技英语的研究初期，人们主要注意的是诸如词汇构成、语法结构、时态、语态等表层语言现象。
The second part is a review of the studies on tense as a grammatical category.
第二部分是概述时态作为语法范畴的研究。
In the English language, there is no fixed grammatical form to express the future tense but only many devices to ex-press the future meaning.
英语中没有表达将来时的特定语法形式，只有表达将来意义的各种方式。
By applying the principles of grammatical metaphor in SFG to the analysis of the tense of projecting verbs in the English academic discourse, we find that grammatical m.
但英语学术语篇中的投射动词时态运作机制还未引起足够的重视。
We know that the English verb involves four grammatical categories, including tense, voice, mood and aspect. Aspect is the internal structure expressed by the contextualized verbs.
英语动词涉及四大语法范畴，包括时态，语态，式态，和体态。
There are difficulties in understanding the proper present tense to use because of the disappointment in applying French grammatical rules to English.
完全理解并能正确运用现在时并不容易，因为将法语语法规则用到英语中常常出错。
In this case, the past or present perfect tense should be used according to the grammatical rules of common English.
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。
Question 10: Now I am learning the grammatical item "past simple tense".
问题10：我是个初中生，现在正在学过去时。
Grammatical Focus: Simple Present Tense; Adjectives; Prepositions.
语法要点：一般现在时；形容词；介词。
Grammatical Focus: Simple Present Tense; Adjectives; Prepositions.
语法要点：一般现在时；形容词；介词。
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