How should I say: "she will have a child" or "she will has a child" and why?

Question

Answer

Hello Jakub,

'Will' is part of the family of modal verbs and they are always followed by a bare infinitive (1st form - no 'to'). So 'she will have a baby'. Other members of this family include 'should', 'would', 'must' ...

You can also use both phrases given by Valery, both natural.

Hope this helps

Bob

Answer

She is expecting a baby / she is pregnant

Answer

"She will have a child" is correct.

I'm not an English teacher, but I believe the reason why is the future tense is expressed as "will" + [infinitive]
Examples: "he will walk" instead of "he will walks"
"she will give" instead of "she will gives"

Answer

Thank you very much! :)

Answer

She will have a child. 
After WILL and WON'T, use the base form (bare infinitive) of the verb.

Verpassen Sie nicht die Gelegenheit, bequem von zu Hause aus eine Sprache zu lernen. Stöbern Sie in unserer Auswahl an erfahrenen Sprachlehrern und melden Sie sich jetzt zu Ihrer ersten Unterrichtsstunde an!