以: use; take现在: now; at present; today; nowa ...完成: accomplish; complete; fulfil ...时: shí]现在完成时: past perfect tense; present perfect现在完成时态: present perfect用现在完成时: all week现在完成时和过去完成时: present and past perfect比较现在完成时与现在完成进行时: mary is still writing letters. she's been writing letters all day现在完成时的一般疑问句: have you ┅ yet与现在完成时态或过去完成时态连用: used with the present or past perfect tense现在完成: present perfect到目前为止（常与现在完成时连用）: so far很多年来，常与现在完成时连用如：: over the years学过的东西我全忘了。（现在完成时标准句）: i have forgotten everything i learned现在完成进行: present perfect continuous在完成时的估算: eac estimate at completion在完成时的预算: bac budget at completion; budget at completion现在完成进行时: present perfect continuous tense; present perfect progressive现在完成进行时态: present perfect continuous现在完成进行体: present perfective progressive在完成时的费用估算: eac=estimate at completion; estimate at completion完成时: when completed现在完成式之任一时态连用: recently以现在为中心: present centered; presentcenteredd
