What do Americans mean by "o ki dao ki"

No problem. OK is actually the abbreviation of OK. They have the same pronunciation and are essentially the same word. Both of them mean "OK, no problem, OK" in spoken language, and their tone is casual, which is suitable for people who are familiar with each other.

In American English, ok (all uppercase), OK (all lowercase) and OK (all lowercase) have exactly the same meaning, and they all mean "OK, no problem". But in usage, there are some differences between them. Strictly speaking, OK can only be capitalized.

However, with the widespread use of ok in short messages and the Internet, lowercase is gradually accepted. However, in more formal written writing, it is recommended to use OK or OK. It is generally believed that OK and OK are interchangeable.

Extended data:

Temporal composition in grammar;

1, simple present tense: indicates the present state, frequent or habitual actions, the subject's personality and ability, etc.

2. Past continuous tense: indicates the behavior or action that is happening or going on at a certain time or moment in the past.

3. The present perfect tense: the influence or result of an action that happened or has been completed in the past on the present, or an action or state that started from the past and continues to the present.

4. Past perfect continuous tense: it means that an ongoing action or state has continued to a certain moment in the past, but it has not been completed and will not be bound until now.

Active voice and passive voice:

The subject is the sender of the action in the active voice, and the subject is the receiver of the action in the passive voice. The object complement is an infinitive without to. When you become passive, you should add "to" before the infinitive. The modal verb +be+ past participle constitutes the passive voice.