现在完成时
例句与用法
- Present perfect as opposed to past simple . past simple as opposed to past continuous and past perfect
现在完成时和一般过去时的对比；一般过去时和过去进行时、 - Our team has won ( win ) every match this year , but we still have three more games to play
联赛仍有场比赛，说明我们队已赢得到目前为止的每场比赛，应使用现在完成时。 - Underline all the verbs in the passage which tell us what happened and what has happened
在课文中的所有动词下面划上横线，并指出哪些是一般过去时，哪些是现在完成时。 - A underline all the verbs in the passage which tell us what happened and what has happened
在课文中的所有动词下面划上横线，并指出哪些是一般过去时，哪些是现在完成时。 - Will i be in time ? ’ she wants to know . - - - - - - she wants to know if she will be in time
如果引语的引述动词是现在时、将来时或现在完成时，我们一般用说话者原话中所用的时态。 - Underline all the verbs in the passage which tell us what happened , what has happened , and what has been happening
划出课文中所有一般过去时、现在完成时和现在完成进行时的动词。 - The amino acid sequence of the synthetic vpu ( 1 - 40 ) peptides used in this study is shown in figure 1a
现在完成时用于指代持续有效的已经进行过的研究或过去开始的现正正在进行的动作。 - The current state of gpcr research has evolved in large measure from observations made in two parallel systems
现在完成时用于指代持续有效的已经进行过的研究或过去开始的现正正在进行的动作。 - These sentences are from the passage . study them carefully . pay close attention to the wrods in italics
下面的这些句子摘自课文，仔细地研究这些例句，特别要注意现在完成时句子中表示时间的状语。 - The present perfect tense is always connected with present time ， hence it is net used with “ yesterday ” ， “ last year ” ， etc
现在完成时总是和现在有关，所以它不能和“昨天” 、 “去年”等一起用。