The personal pronouns in Turkish are 'ben, sen, o, *, siz, onlar'. Which one should be placed for * in the sentence?

Which one is the interrogative pronoun for "why" in Turkish?

'-lar' and '-ler' are the plural form variants in Turkish. The vowel harmony determines which should be used for a noun. So, which word took the incorrect variant of the plural form?

'-dı', '-di', '-du', '-dü', '-tı', '-ti', '-tu', and '-tü' are 8 variants for the past tense suffix in Turkish. We have to pay attention the vowel and consonant harmony rules when we choose the correct one. So, which one is the incorrect usage? 

'annem' means "my mother"; 'baban' means "your father"; 'kalemi' means "her/his pen". So, which one is the correct for "your money"?

There is an important difference the meaning of this two noun phrase: "öğretmen çantası" and "öğretmenin çantası". '-in' in the latter makes the difference. So, how can be translate the second one? 

Which one is the correct usage about the present continuous suffix in Turkish?

Which one is the correct usage about negative way of the present continuos suffix in Turkish?

"She/he is running out the park to the house." How can we translate it into Turkish?

"I am looking down at the earth from the sky in an airplane." How can we translate it into Turkish?

Ben, uçakta gökyüzünden yeryüzüne bakıyorum.

Ben, uçaktan gökyüzüne yeryüzünü bakıyorum.

Ben, uçağa gökyüzünün yeryüzünde bakıyorum.

Ben, uçağın gökyüzünde yeryüzünden bakıyorum.

"I heard later from someone else that you had come." How can we translate it into Turkish?

"The children are happier than adults." How can we translate it into Turkish?