我的妹妹只有三岁,她经常对我微笑.翻译成英语.

我的妹妹只有三岁,她经常对我微笑.翻译成英语.
我的妹妹只有三岁,她经常对我微笑.翻译成英语.

我的妹妹只有三岁,她经常对我微笑.翻译成英语.
My sister is only three years old,she often smile to me.

My younger sister is three years old. She often smiles at me. sister是姐妹， 前加younger（young的比较式）指更年轻的， 合在一起时是妹妹， smile要加s因为前面的she是第三人称单数。 smile at固定词组。

my three years old little sister often smile at me.
我那只有三岁的小妹妹经常对我笑。

my younger sister only 3 years old,she always smiles to me.

My sister is just three years old, she usually smiles to me.

My sister is only three years old and she often smiles to me.
望采纳

直译：My little sister is only three years old , she often simles to me .
个人认为可以稍加改动语义比较好些：
My little sister is only three years old , however , she like simling to me very much .

my sister is only 3-year-old.she always smile to me.

My little sister is only three years old, she always smiles to me.
全手打，望采纳。

my sister is only three.she often smiles to me .

My sister is only three years old, she often smile to me.

My younger sister is only three years old, she always smiles to me.

My sister is only 3 years old, she always smiles at me.

My young sister who is just three years old, often looks to me with a smile face

My sister is only three years old, she ofen smiles at me.

my sister is a three years-old girl who often smiles to me.

My sister is only three years old, she often smiled at me

My sister is only three years old, she often smile to me

my younger sister is only 3 years old, and she often laugh to me.

My three year- old little sister is always smiling at me.

my sister is pnly 3 years old, and she often smiles to me.

My younger sister is just three years old, she always simles to me.

My sisiter is only three years old,she often smiles to me.

My younger sister is three years old，however， she often smiles at me. younger（young的比较式）指更年轻的， smile at sb是固定搭配， often 表示频率，这里指经常， she是第三人称所以smile要加s。

My sister is just 3 years old and she smiles to me a lot.

My sister is only 3 years old , she always smiles at me

My sister is only three years old, and she always smile to me