If and when Tyler shows up, I don't want her here alone.要是泰勒出现了我不想让她独自一人

show up:揭露；露面，出现

His show-off only serves to show up his ignorance.

他的卖弄只不过暴露了他自己的无知。

The students began to show up by twos and trees.

学生们开始三三两两地露面了。

相关短语:put up a poor show表现得不好

Our team put up a poor show in the final and lost heavily.

我们队在决赛时表现得不好, 输得很惨。

I mean, you're welcome to come over, too, if you like.当然如果你想过来，我也鼓掌欢迎

come over:顺便来访,从远处来

He has come over to China for the summer.

他不远万里来中国度暑假。

You really must come over sometime and have dinner with us.

你确实应该找个时间过来, 跟我们一起吃顿饭。

Got a great view of your porch from up here in case Amanda Clarke comes digging around again.要是阿曼达·克拉克又去你那里找东西从这里可以看得一清二楚

in case:万一，以防；如果

In case you need something, please don't hesitate to let me know.

如果你需要什么东西，请不客气地对我说。

I have kept a reserve fund in case of accidents.

我已筹备了一笔准备基金以防不测。