whileIwaswashingmyhair中的动词是过去未完成时。
In 'while I was washing my hair', the verb is in the imperfect.
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.
西班牙语的动词现在时有六种形态，过去时、未完成时、将来时、条件句、虚拟句以及另外两种过去时虚拟式也各自有六种形态，加起来一共是48种。
A Spanish verb has six present-tense forms, and six each in the preterite, imperfect, future, conditional, subjunctive and two different past subjunctives, for a total of 48 forms.
不定过去时某些语言中动词的一种形式，如古希腊语中，其不表明动作是否已完成或正在继续。
A form of a verb in some languages, such as Classical Greek, that expresses action without indicating its completion or continuation.
用动词的正确形式将下面的句子变成现在完成时的被动语态。
Change these sentences into the present perfect passive putting the verbs into the correct forms.
它们是用作现在完成时和过去完成时的助动词。
They are used as auxiliaries to the present and past perfect tenses.
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.
用所给动词的一般现在时，将业进行时或将来完成时填空。
Fill in the blanks with verbs given in the Simple Future, the Future Proguessive or the Future Perfect Simple.
用括号中所给的动词的现在进行时完成句子，必要时变化词序。
Complete these sentences with the present continuous form of the verbs given in the brackets, changing the word order where necessary.
用括号中所给的动词的现在进行时完成句子，必要时变化词型。
Complete these sentences with the present continuous form of the verbs given in the brackets, changing the word form where necessary.
用动词的正确形式将下面的句子变成现在完成时的被动语态。
Change these sentences into the Present Perfect Passive, putting the verbs into the correct forms.
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.
应用推荐