tah

ط

The Arabic letter tah can appear in four different forms: isolated, initial, medial and final.

finalmedialinitialisolated
ـطـطـطـط

When you show the letter on its own, you use the isolated form.

ط

When the letter is the first letter of a word, you use the initial form.

طـ

For example these words:

cooking
Tabkh
طَبخ
demand
Talab
طَلَب
end
Taraf
طَرَف

When the letter is not the first and not the last but somewhere in the middle of a word, you use the medial form in most cases.

ـطـ

For example these words:

scent
3iTr
عِطر
Qatar
qaTar
قَطَر
hero
baTal
بَطَل

When the letter is the last letter of a word, you use the final form in most cases.

ـط

For example these words:

pressure
DaghT
ضَغط
comb
mishT
مِشط
cat
qiTT
قِطّ

Now you know that:

In most cases...
Let us look at the other cases!

The letter tah has dual joining, like most Arabic letters. It wants to join with both the letter before it and the letter after it.
But some letters has right joining. They only want to join with the letter before it (which is the letter to the right since Arabic is written from right to left).

When the letter is in the middle of a word, and follows a right joining letter, you use the initial form.

طـ
homeland
waTan
وَطَن

When the letter is the last letter of a word, and follows a right joining letter, you use the isolated form.

ط
condition
sharT
شَرط

Now you know that:

That's it!
The rules you just learned can be applied to all Arabic letters with dual joining, which is most of them.

Previous letter: dad ض Next letter: za ظ