"My father does not have a younger sister."

Translation: 我的爸爸没有妹妹。

[and.kelley.love]

的 is unnecessary

[deactivated user]

嗯，您對了。

[joy.zou]

I've said this with many other lessons- adding "一个" should be acceped! It literally says "does not have A younger sister" not "does not have younger sister"

[Jo-AnnHan]

我的 爸爸 不 有妹妹 is incorrect. Why? I thought that 不 negates the verb.

[valiendomother]

When it comes to the verb Have (有yǒu) and negation 不 bù is not used, instead it's 没有méiyǒu.

Ex:
1. I don't drink tea (我不喝茶 Wǒ bù hē chá)
2. I don't have tea (我没有茶 Wǒ méiyǒu chá)

[whale-shark]

我的爸爸没有一个妹妹 was marked up as being wrong, not quite sure why can someone help please?

[HaydenMiner]

Using 一个(yīgè) would specifically state that your father does not have ONE younger sister. In that case maybe you would say "He doesn't have one, he has four!"
我的爸爸没有妹妹 is how you say that he has none at all. Although in English when we use the article "a" it typically means one of something, in this case we mean that he doesn't have any at all.

[Dane358388]

Can anyone please explain why family members have their symbols twice?

[DatSovietAlexso]

They can also be used just once, it is mainly for convenience.

[DheerajBhaskar]

When to use which 没 vs 没有。Is 没 used alone?

[DatSovietAlexso]

Just 没 is used to say "no" in the past tense, like 昨天我没上课了

[maite.alarcon]

I think duolingo courses is not pretty correct 100% the grammar is too rigid. Do you think the way as i do?

[joy.zou]

I put : 我的爸爸没有一个妹妹
Duolingo said that was wrong even though it says "does not have A younger sister"

[deactivated user]

這個句子對了可是，我不同意跟它。

[PMkQau]

My answer was right!