现在完成时在第8单元讲解。
Ihave eaten是动词eat的现在完成时；Ihad eaten是过去完成时；Iwill have eaten是将来完成时。
'I have eaten' is the present perfect tense of the verb 'to eat', 'I had eaten' is the past perfect and 'I will have eaten' is the future perfect.
这件事情是不是非要现在完成？
配置现在完成，准备好进行测试。
仓库的自动配置现在完成了。
The automatic configuration for your repository is now complete.
仓库的手工配置现在完成了。
The manual configuration for your repository is now complete.
任务配置工作现在完成了。
Eric现在完成了公司所提出的要求。
您现在完成了第二张卡。
他们想现在完成作业。
我必须要现在完成这项工作吗？
现在完成时总是一类现在时态。
我们现在完成了对SWTGUI控件的游历。
工作现在完成了；我们可以去度假了。
用现在完成时的被动语态改写下列句子。
Rewrite the following sentences using the present perfect passive voice.
掌握现在完成时态的用法。
我一读完就把书还回去。(现在完成时)。
我一读完就把书还回去。(现在完成时)。
我们现在完成了RUP的用例分析活动中的前三步。
We now have completed the first three steps in RUP's Use Case Analysis activity.
不，你不需要现在完成，你有三天的时间。
用括号里动词的现在完成时态来填充空格。
Fill in the blanks with the present perfect tense of the verbs in brackets.
现在完成时和过去完成时都属于完成时态。
The present and past perfect tenses both belong to the perfect tense.
大部分的语法都是一般过去时和现在完成时。
这是可能的只有一个人，现在完成复杂的程序。
It is possible to accomplish a complicated program by only one person now.
谈论过去的事件其对现在不重要，不用现在完成时。
When we talk about past events which have no present importance, we do not use the present perfect.
现在完成时用来表达开始于过去但仍在现在持续的动作。
The present perfect is used to express an action that started in the past but still continues in the present.
现在完成时用来表达开始于过去但仍在现在持续的动作。
The present perfect is used to express an action that started in the past but still continues in the present.
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