yínhángkǎ dòngjié le, bùnéng zhuǎnzhàng.

Here, 了 marks a new situation or completed change of state: the bank card has become frozen / is now frozen.

So 银行卡冻结了 does not just describe freezing in the abstract. It tells you that this status has happened and is now relevant.

Compare:

• 银行卡冻结。 = a very bare, written-style statement like The bank card is frozen or Bank cards are frozen
• 银行卡冻结了。 = The bank card got frozen / has been frozen / is now frozen

In everyday speech, 了 often appears when reporting something that has just happened or when the speaker is pointing out a changed condition.

Both are possible, but they are a little different in style and focus.

• 银行卡冻结了 = common, natural, concise; focuses on the result/state
• 银行卡被冻结了 = explicitly passive, The bank card was frozen; focuses more on the action done to it

In Chinese, you often do not need a passive marker like 被 when the meaning is already clear from context. Since a bank card does not freeze itself, 冻结了 is enough.

So this sentence sounds very natural in everyday use.

It behaves like a verb, but in this sentence it describes the card’s resulting condition, so it feels similar to an adjective in English.

• basic meaning: to freeze
• in context: to be frozen

Chinese often uses verbs this way. A verb plus 了 can describe a new state:

• 门关了 = The door is closed / got closed
• 银行卡冻结了 = The bank card is frozen / got frozen

So grammatically it is still verbal, even though the English translation may sound adjectival.

Chinese often omits information that is obvious from context.

• 银行卡冻结了 = The bank card is frozen
• depending on context, it may really mean my bank card, your bank card, or some specific card already being discussed

If the speaker wants to be more explicit, they can say:

• 我的银行卡冻结了。 = My bank card is frozen.
• 这张银行卡冻结了。 = This bank card is frozen.

Leaving out possessives is very common when the listener can easily infer them.

Here 不能 means cannot because of inability or circumstances.

So:

• 不能转账 = cannot make a transfer
• the reason is given by the first clause: the card is frozen

It is not mainly a prohibition like you must not transfer. It is more like you’re unable to transfer because the card is frozen.

A useful comparison:

• 不能 = cannot / be unable to / not be allowed to, depending on context
• 不可以 = not allowed to
• 不会 = won’t / not know how to

In this sentence, 不能 clearly expresses inability caused by the frozen status.

转账 means to transfer money, usually from one account or card to another.

It is commonly used for bank transfers, app transfers, and other financial transfers.

Examples:

• 我给你转账。 = I’ll transfer money to you.
• 不能转账。 = Unable to make a transfer.

In English, learners may wonder whether it means remit, wire, or send money. In everyday Chinese, 转账 is a broad, common term covering many kinds of money transfer.

Chinese often drops subjects when they are easy to infer.

In this sentence:

• 银行卡冻结了，不能转账。

the understood subject of 不能转账 is something like (therefore one/I/you/the card’s owner) cannot transfer money.

More naturally in English, we supply the missing idea:

• The bank card is frozen, so I can’t transfer money.
• The bank card is frozen, so transfers can’t be made.

Chinese does not always state every subject as explicitly as English does.

Not really. Even though 银行卡 appears first, the meaning is not that the card itself is acting as a human-like subject.

Chinese often uses a topic-comment structure or simply leaves part of the second clause understood. The meaning is more like:

• As for the bank card, it is frozen, so transfers can’t be made.
• Because the bank card is frozen, I/you can’t transfer money.

So you should understand the sentence by sense, not as a rigid word-for-word mapping.

Yes. You could say:

• 银行卡冻结了，所以不能转账。

This makes the cause-and-result relationship more explicit:
The bank card is frozen, so it’s impossible to transfer money.

Without 所以, the causal relationship is still very clear. Chinese often omits connectors like so, therefore, or because when the connection is obvious.

So the original version is perfectly natural and slightly more concise.

The comma separates two closely connected clauses:

• 银行卡冻结了
• 不能转账

This is very common in Chinese writing. A comma can link cause and result without needing an extra word like so.

So the punctuation helps show:

• first clause: the problem
• second clause: the consequence

It is similar to writing in English:

• The bank card is frozen, so transfers can’t be made.

银行卡 specifically means bank card.

It usually refers to:

• a debit card
• sometimes a credit card, depending on context
• generally the physical or linked card used for banking transactions

If you want to say bank account, that is usually:

• 银行账户
• or simply 账户

This matters because 冻结 can apply to either a card or an account, but the Chinese words are different:

• 银行卡冻结了 = The bank card is frozen.
• 银行账户冻结了 = The bank account is frozen.

That would usually sound wrong for this meaning.

The standard word here is 冻结, not just 冻.

• 冻 usually means to freeze in the physical, temperature sense
• 冻结 is the formal/financial term for freezing an account, card, funds, etc.

So for banking or legal contexts, use:

• 冻结
• 被冻结

not normally 冻 by itself.

It is fairly neutral and natural, especially in banking or customer-service contexts.

• 银行卡 and 转账 are everyday financial vocabulary
• 冻结 is slightly formal in itself, but it is also the normal word for this situation
• the whole sentence sounds like something you might hear from a bank app, a service agent, or an ordinary speaker explaining the problem

So it is not slang, but it is also not unnaturally stiff.