1
pen sth
pen在表示“写”时较正式，常用于书面语。
She penned a heartfelt letter to her grandmother.
她给祖母写了一封真挚的信。
撰写；写作
pens — third person singular of pen
先理解核心含义，再看它在真实句子里的用法。
撰写；写作
To write or compose something such as an article or book.
She penned a heartfelt letter to her grandmother.
她给祖母写了一封真挚的信。
把...关入围栏
To enclose in a pen.
撰写(文章、书等)。
To write (an article, a book, etc.).
pen
Base
原形
pens
3rd person
第三人称单数
penning
-ing
现在分词
penned
Past
过去式
penned
Past participle
过去分词
She pens a letter every week.
她每周写一封信。
He penned a novel last year.
他去年写了一部小说。
I am penning a poem right now.
我现在正在写一首诗。
动词pen为规则变化，注意重读闭音节双写n。
He penned a heartfelt letter to his grandmother.
他给祖母写了一封真挚的信。
She is penning her memoirs in a cozy café.
她正在一家舒适的咖啡馆里撰写回忆录。
Many poets pen verses inspired by nature.
许多诗人写下受自然启发的诗句。
pen在表示“写”时较正式，常用于书面语。
She penned a heartfelt letter to her grandmother.
她给祖母写了一封真挚的信。
也可用于比喻意义，如“被限制在狭小空间”。
The farmer penned the sheep in the enclosure.
农夫把羊关进围栏里。
Not this
He pen a letter yesterday.
Use this
He penned a letter yesterday.
动词过去式错误：pen的过去式是penned，需要双写n再加ed，而非直接使用原形。
Not this
I need two pens, but I only have one pen.
Use this
I need two pens, but I only have one.
名词重复错误：pen作为可数名词，在第二次提及时应使用代词one代替，避免重复名词本身。