Saying 'too' (de, da)

One Little Word: de

De (too, also) adds "me too / that too" to any sentence. It follows the word it belongs to and obeys two-way vowel harmony, just like the plural -lar/-ler:

Last vowel of the word beforeSpelling
e, i, ö, üde
a, ı, o, uda
I am a doctor too.
Ben de doktorum.
The man is a teacher too.
Adam da öğretmen.

A Separate Word — Not the Locative!

You just learned the locative suffix -de/-da (in, on, at). The "too" word looks identical but is written separately — and the space changes the meaning completely: evde = "in the house", but ev de = "the house, too". Even native writers mix these up!

The cat is at home too.
Kedi de evde.

It Never Becomes -te/-ta

One more difference from the locative: after voiceless consonants the locative hardens (kitapta = in the book), but the "too" word never does — kitap da = "the book too", always with d.

The children are happy too.
Çocuklar da mutlu.