陽光、燈、影、衣、冒 in，

　　即在陽光下，在燈下，在樹陰下，穿衣、著裝、冒雨等都要用in。

　　例：Don't read in dim light. 切勿在暗淡的燈光下看書。

　　They are reviewing their lessons in the bright light. 他們在明亮的燈光下復(fù)習(xí)功課。

　　They are sitting in the shade of a tree. 他們坐在樹陰下乘涼。

　　a prisoner in irons 帶著鐐銬的囚犯

　　He went in the rain to meet me at the station. 他冒雨到車站去接我。

　　The poor dressed (clothed) in rags in old society. 舊社會窮人們衣衫襤褸.

　　以及：in the bright sunlight 在明亮的陽光下

　　a merchant in disguise 喬裝的商人

　　the woman in white (black, red, yellow) 穿著白(黑、紅、黃)色衣服的婦女

　　in uniform 穿著制服

　　in mourning 穿著喪服

　　in brown shoes 穿著棕色鞋

　　in his shirt sleeves 穿著襯衫

　　將來時態(tài)in...以后

　　例: They will come back in 10 days. 他們將10天以后回來。

　　I'll come round in a day or two. 我一兩天就回來。

　　We'll be back in no time. 我們一會兒就回來。

　　Come and see me in two days' time. 兩天后來看我。(從現(xiàn)在開始)

　　after... (從過去開始)

　　小處at大處in

　　例：Li and I arrived at Heishan county safe and sound, all is well. Don't worry. 李和我平安地到達(dá)黑山縣，一切很好，勿念。

　　I live in a great city (big city), my sister lives at a small town while my parents live at a village. 我住在大城市，我姐姐住在一個小城鎮(zhèn)，而我的父母則住在農(nóng)村。

　　I'm in Liaoning, at Anshan. 我住在遼寧省鞍山市.

　　有形with無形by，語言 、單位、材料in

　　例：The workers are paving a road with stone. 工人們正用石子鋪路。(有形)

　　The teacher is correcting the paper with a new pen. 這位教師正用一支新筆批改論文。(有形)

　　"Taking Tiger Mountain by Strategy" is a good opera. <<智取威虎山>>是-出好戲。(無形)

　　The product is separated by distilation into gasoline and gas oil. 這種產(chǎn)品是用蒸餾分離出氣油和粗柴油。 (表示方式、手段、方法--無形)

　　I really can't express my idea in English freely in-deed. 我確實不能用英語流利地表達(dá)我的思想。 (表示某種語言用in)

　　I wrote a novel in Russian. 我用俄語寫了一本小說。(同上)

　　The kilometer is the biggest unit of length in the metric system. 公里是米制中最長的長度單位。 (表示度、量、衡單位的用in )

　　The length is measured in meter, kilometre, and centimetre. 長度是以米、公里、厘米為單位來計算的。(同上)

　　This board was cast in bronze not in gold. 這個牌匾是銅鑄的，不是金鑄的。