אחרי השיעור כתבתי לחברה שלי שהעברית שלי משתפרת, והיא ענתה שזה נשמע נהדר.

השיעור means the lesson / the class. With אחרי (after), Hebrew often uses the definite form when the class is a specific one both speaker and listener can identify.

So:

• אחרי השיעור = after the class / after the lesson
• אחרי שיעור would sound more general, like after a class / after a lesson, or it may appear in certain fixed expressions

Also, שיעור can mean either lesson or class, depending on context.

כתבתי is the past tense, first person singular form of לכתוב (to write).

So:

• כתבתי = I wrote

A useful point: in the past tense, Hebrew usually marks person, number, and often gender, but כתבתי is the same whether the speaker is male or female.

Examples:

• אני כתבתי = I wrote
• הוא כתב = he wrote
• היא כתבה = she wrote

Because ל־ means to. With לכתוב, if you write to someone, Hebrew uses ל־:

• כתבתי לחברה שלי = I wrote to my friend

Without ל־, it would not mean I wrote to my friend.

There is also a spelling point here: in normal unvocalized Hebrew, לחברה can hide the definite article. ל + ה contracts, so to the / to my friend can still appear as לחברה in writing.

All three are possible meanings of חברה, depending on context:

• female friend
• girlfriend
• company

In this sentence, the natural reading is my female friend. Nothing in the sentence strongly suggests company, and girlfriend is possible in theory, but usually context would make that clearer.

In Hebrew, possessive phrases with שלי normally use this order:

noun + שלי

So:

• חברה שלי = my friend
• העברית שלי = my Hebrew

This is the normal Hebrew word order for this kind of possession. English puts my before the noun, but Hebrew puts שלי after it.

Because it belongs to two different nouns:

• חברה שלי = my friend
• העברית שלי = my Hebrew

Hebrew does not let one שלי automatically cover both nouns here. Each possessed noun needs its own possessive marker.

So the repetition is completely normal.

ש־ means that in this sentence. It introduces a clause.

So:

• שהעברית שלי משתפרת = that my Hebrew is improving
• שזה נשמע נהדר = that it sounds great

Hebrew often attaches ש־ directly to the next word, instead of writing it as a separate word.

Because עברית is a feminine singular noun, and משתפרת agrees with it.

• העברית שלי משתפרת = my Hebrew is improving

In Hebrew, present-tense forms like משתפר / משתפרת often behave a lot like adjectives in that they agree with the subject in gender and number.

Compare:

• העברית שלי משתפרת = feminine singular
• הידע שלי משתפר = masculine singular

So the feminine ending ־ת is there because עברית is feminine.

Because the subject is היא (she), so the verb must be feminine singular in the past tense.

• היא ענתה = she answered / she replied
• הוא ענה = he answered / he replied

Hebrew past tense agrees with the subject, so this feminine ending is required.

Because זה here does not refer directly to העברית. It refers to the whole idea or statement: that my Hebrew is improving.

Hebrew very often uses זה in the masculine singular to refer to an entire situation, fact, or idea.

So:

• זה נשמע נהדר = that sounds great

Because זה is masculine singular, the rest matches it:

• נשמע
• נהדר

If she were talking directly about the Hebrew itself, a feminine version would be possible, for example:

• העברית שלך נשמעת נהדרת = your Hebrew sounds wonderful

Yes. In modern Hebrew, כתבתי ל... can often mean I wrote to..., I messaged..., or I texted..., depending on context.

So this sentence could describe:

• sending a text
• writing in a chat
• sending a message online
• writing an email

If someone wants to be more explicit, they might say:

• שלחתי הודעה = I sent a message

But כתבתי לחברה שלי is very natural for everyday messaging too.