男女疯狂一边摸一边做羞羞视频|啊好深好硬快点用力别停动态图|亚洲一区无码中文字幕|特级无码毛片免费视频播放▽|久久狠狠躁免费观看|国内精品久久久久久网站

previously詞典解釋

1. 先前；以前
Previously means at some time before the period that you are talking about.

previously

e.g. Guyana's railways were previously owned by private companies...
圭亞那的鐵路以前是歸私有企業(yè)所有的。
e.g. The contract was awarded to a previously unknown company...
合同簽給了一個(gè)之前并不知名的公司。

2. （一段時(shí)間）以前
You can use previously to say how much earlier one event was than another event.

e.g. He had first entered the House 12 years previously...
12年前，他首次成為議員。
e.g. She had rented the flat from the council some fourteen months previously.
大約14個(gè)月以前，她從地方政府那里租下了這套公寓。

If you are talking about a period measured back from some earlier time, you use before or previously. He had died a month before…She had rented the flat some fourteen months previously. You only use ago when you are talking about a period of time measured back from the present. You use for to say how long a period lasts in the past, present, or future, or how much time passes without something happening. She slept for eight hours… He will be away for three weeks… I hadn't seen him for four years. You use since to say when a period of time started. She has been with the group since it began. …the first civilian president since the coup 17 years ago. You also use since to refer to the last time that something happened, or to how much time passes without something happening. She hadn't eaten since breakfast… It was a long time since she had been to church.
如果談?wù)撨^(guò)去某個(gè)時(shí)間以前的時(shí)間，用 before 或者 previously：He had died a month before（他一個(gè)月前去世了），She had rented the flat some fourteen months previously（她大約14個(gè)月以前租下了這套公寓）。ago僅用于談?wù)摤F在之前的某段時(shí)間。for用來(lái)表示過(guò)去、現在或將來(lái)持續的一段時(shí)間或者某事多長(cháng)時(shí)間沒(méi)有發(fā)生，如：She slept for eight hours（她睡了8個(gè)小時(shí)），He will be away for three weeks（他會(huì )離開(kāi)3個(gè)星期），I hadn't seen him for four years（我已經(jīng)有4年沒(méi)有見(jiàn)過(guò)他了）。since用來(lái)表示某段時(shí)間的開(kāi)始，如：She has been with the group since it began（自從該集團創(chuàng )立起她就一直在其中工作），the first civilian president since the coup 17 years ago（自從17年前發(fā)生政變以來(lái)的第一位平民總統），since也可以用來(lái)某事最后一次發(fā)生的時(shí)間或者某事多長(cháng)時(shí)間沒(méi)有發(fā)生，如：She hadn't eaten since breakfast（她早餐以后就沒(méi)吃過(guò)東西），It was a long time since she had been to church（她好久沒(méi)去過(guò)教堂了）。