试用括号里动词的过去完成时态或一般过去时态来填充空格。
B. Fill in the blanks with the past perfect or simple past tense of the verbs in brackets.
我们经常用现在完成时态来说新闻：尤其常见于报道、信函、会话。
We often use the present perfect to give news: it is especially common in reports, letters and conversations.
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。
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.
我们用将来完成时态来形容一个在未来特定的一个时间已经完成的动作。
We use the future perfect tense to talk about an action that will be completed at a given time in the future.
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.
到2011年的时候，上海已经举办好了世博会。(用将来完成时态)。
海伦把钥匙忘到办公室里了，因此她不得不等她丈夫回来。对于过去完成时态练习题。
Helen had left her keys in the office so she had to wait until her husband came home.
本研究旨在探究母语为汉语的学生在习得英语现在完成时态时，其过渡语中母语时体特征的表现方式、存在原因和发展趋势。
The present study focuses on three parameters according to the three Characteristics of the Chinese Temporality (CCTs): time-phrase influence, time-space influence and tense choice.
当你谈论在过去开始但是一直持续到现在的某事时，用现在完成时态，例如：I’vebeentherefor5years/我在那里已经5年了。
When you ask about something that started in the past but continues to the present time, you use the Present Perfect tense, e.g.: I’ve been there for 5 years / I’ve been there for 5 years.
如果所谈论的事情完全发生在过去，则用过去时态(有时也叫做未完成时态)，例如：I used to live in Seattle /我过去住在西雅图。
If you are talking about something that is completely in the past, you use the Past Tense (sometimes called the Imperfect), e.g.
我们用过去完成进行时态来形容一个在过去开始的行动，这个行动持续到过去的另一个时间。
We use the past perfect continuous tense to show that an action started in the past and continued up until another time in the past.
用现在的时态，把它想象为已经完成了的事。如果把它描述成将来的事件就永远不能接触到它了——它在将来啊。
Phrase it in the NOW, as though it is already achieved. Phrasing it as a future event tends to keep it always out of reach — in the future.
我们用将来完成进行时态来形容一个行动在未来特定的时间里已进行多久了。
We use the future perfect continuous tense to talk about how long an action will be going on at a future time.
戏剧文学为正在完成式时态，又要求剧作家对情节人物等不能过分操纵。
The drama is also in the present continuous tense, so it requires that the dramatist not control the plot and characters too much.
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.
用正确的时态填空，完成练习后再对照课文核对你的答案。
Give the correct form of the verbs in parentheses. Do not refer to the passage until you have finished the exercise.
用正确的时态填空，完成练习后再对照课文核对你的答案。
Give the correct form of all the verbs in parentheses. Do not refer to the passage until you finish the exercise.
用正确的时态填空，完成练习后再对照课文核对你的答案。
B Give the correct form of the verbs in parentheses. Do not refer to the passage until you have finished the exercise.
用正确的时态填空，完成练习后再对照课文核对你的答案。
B Give the correct form of all the verbs in parentheses. Do not refer to the passage until you finish the exercise.
英文摘要时态的运用也以简练为佳，常用一般现在时、一般过去时，少用现在完成时、过去完成时，进行时态和其他复合时态基本不用。
The use of tenses in English also is better to concise, commonly used present tense, the past tense, use less when completed, the past is finished now, tense and other composite tense basic need not.
在时态XML索引领域，较多是在时态xml文档更新时产生一个新版本，需要遍历不同的版本才能完成查询处理，影响查询处理性能。
In temporal XML index areas, most of them generate a new version when updating temporal XML document and need to traverse different versions to complete query processing.
用正确的时态完成下列句子。
用正确的时态填空，完成练习后再对照课文核对你的答案。
Give the correct form of the verbs in parentheses. Do not refer to the passage until you finish the exercise.
For example：这个问题是用现在完成进行时来提问的，所以回答时也用进行时态的这个动词。
The question is in the present perfect continuous so you will answer with the verb in the continuous.
For example：这个问题是用现在完成进行时来提问的，所以回答时也用进行时态的这个动词。
The question is in the present perfect continuous so you will answer with the verb in the continuous.
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