They contempt computer work.

本句缺少动词，而{contempt}作为名词 无法充当谓语动词使用。在这里可以使用feel contempt for sth.

They feel contempt for computer work.

I turn right to park.

{park}为普通可数名词，通常要有a/the冠词连用。

I turn right to the park.

She has learned writing for 20 years

good！

We cut the potatos.

名词变成复数的时候，有一些特殊情况-es
例如：
tomato－tomatoes
potato－potatoes
hero－heroes

potatoes

He attends his school a feld trip.

1. {attend school} 为固定搭配。同第一句解析。
2. {a feld trip} should be {field trip}, please watch out your spelling.
3. {attend school}与{a filed trip}之间可以改成： a school field trip;

He attends a school field trip.

Her humstar runs around inside a ball.

hamster

They dispise thers school.

要注意拼写错误{dispise} {thers}。

They despise their school.

She runs slow, but she was smart.

1. {runs}和{was}，前后时态不一致，runs是现在时，was是be动词「am /is/ are」的过去式，需要统一时态。描述客观现状，一般现在时就可以。

She runs slow, but she is smart.

His mom turn into a aligeter.

1. {aligeter}should be{alligator}, 这个名词前加不定冠词的时候，要用an. 同样类型的单词还有: an apple; an egg.
2. {His mom} is the third person singular, please add -s at the end of {turn}

His mom turns into an alligator.

He learns slow, but he runs fast.

good！