我应该怎么称呼你呢？

Wǒ yīnggāi zěnme chēnghu nǐ ne?

How should I address you?

有一些亲戚我也不知道该怎么称呼他们。

Yǒu yìxiē qīnqi wǒ yě bù zhīdào gāi zěnme chēnghu tāmen.

There are some relatives I don’t even know how to address.

称呼长辈的时候，通常不会叫他们全名。

Chēnghu zhǎngbèi de shíhou, tōngcháng bú huì jiào tāmen quánmíng.

When addressing elders, you usually don’t call them by their full names.