1
the southeast
作名词，常与定冠词the连用，指东南方向或东南地区。
The southeast has a humid subtropical climate.
东南地区属湿润的亚热带气候。
东南
southeasts — plural of southeast
先理解核心含义，再看它在真实句子里的用法。
东南
the compass point midway between south and east; at 135 degrees
The southeast has a humid subtropical climate.
东南地区属湿润的亚热带气候。
介于东和南之间的中间方位点,具体方位角为135°。
The intercardinal compass point halfway between east and south; specifically at a bearing of 135°.
南和东之间的方位点,位于135度。
the compass point midway between south and east; at 135 degrees
美国东南部地区。
the southeastern region of the United States
朝向东南方位点的方向。
the direction corresponding to the southeastward compass point
The river enters the lake from the southeast.
这条河从东南方向流入湖中。
Our house is in the southeast of the village, close to the forest.
我们的房子在村庄的东南部，靠近森林。
The warm wind usually comes from the southeast in spring.
春天暖风通常来自东南方向。
作名词，常与定冠词the连用，指东南方向或东南地区。
The southeast has a humid subtropical climate.
东南地区属湿润的亚热带气候。
作形容词，通常置于名词前作定语，表示“东南的”。
The hotel is on the southeast corner of the square.
酒店在广场的东南角。
作名词，与介词to搭配，表示“在……的东南方”。
The farm is to the southeast of the village.
农场在村庄的东南方。
Not this
Shanghai is in southeast of China.
Use this
Shanghai is in the southeast of China.
southeast 作名词表示“东南地区”时是特指方位，前面需要定冠词 the；中文没有冠词，所以容易漏掉。
Not this
The village is at the southeast of the valley.
Use this
The village is in the southeast of the valley.
表示“在某个范围内部的东南部”时，介词要用 in，表示在该区域之内；at 用于具体点或地址，不用于区域范围。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
东南亚
Southeast Asia has a tropical climate.
东南亚属于热带气候。
东南角
The post office is at the southeast corner of the square.
邮局在广场的东南角。
东南海岸
They live on the southeast coast of England.
他们住在英格兰的东南海岸。
东南风
A gentle southeast wind kept the air cool.
柔和的东南风使空气保持凉爽。
在东南部
Rain is expected in the southeast later today.
预计今天晚些时候东南部有雨。
在东南方向
The island lies to the southeast of the mainland.
该岛位于大陆的东南方向。
发长 /iː/ 音 (如 sea, tea)
Same pattern, same sound
Use southeasts naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 south（南）和 east（东）拼在一起，就像指南针从南向东转 45 度，记住 southeast 就是东南。
语域：neutral 常见场景：地图与地理、气象与风向、旅行与方位 southeast 作名词或形容词时通常为中性语体，多用于地图、地理、天气、旅行等场景；常见于 the southeast、southeast Asia/coast 等搭配，没有明显口语或书面限制。
作名词表示方向或地区时，通常与 the 连用，如 the southeast；作形容词时常作定语，如 the southeast region。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.
Watch the sound change