be good at加名詞、介詞賓格或名詞性短語，如接動詞要加動詞的ing形式。

be good at后面加什么

be+good+at后面加動詞的ing形式，即動名詞形式，be+good+at+doing+sth.的意思是“擅長做某事”，當你想英語表示某人擅長做某事，就可以用這個短語來表示。

be good at例句：

John is good at swimming and basketball.

It is important that we try to be good at everything we do.

I have a shrill voice. I'll never be good at singing.

good相關短語

do good

1.有用的 useful

this cough medicine tastes nice but it doesn't do much good.這咳嗽藥不難吃,但作用不大。

2.有益于某人 benefit sb

eat more fruit, it will do you good.多吃水果,對你有好處。

much good may it do you.但愿對你大有好處。

you should do good to others.你應該對別人行善。

a good few

相當多(的),幾個 a considerable number (of); several

“how many came?”“a good few.”“來了多少?”“不少?！?/p>

as good as

幾乎,實際上 almost, practically

he as good as said i'm a liar.他無異于說我撒謊。

good and ...

〈美口〉完全,徹底 completely

i won't go until i'm good and ready.我完全準備好了才去。

good for sb

某人干得好(用以祝賀某人) doing well (used when congratulating sb)

she passed the exam?good for her!她考試及格了?真行!