You can add a period: let's go there and look for it. You can also add an exclamation point: let's go there and find it! The tone is a little heavier than the period, but everything is ok. You can't use question marks.

The punctuation mark after "ba" should be an exclamation point, and "ba" is a modal particle, so you can add an exclamation point after it. The "ba" at the end of the sentence indicates consultation, request and order, and uses exclamation marks or periods, such as: let's go! "Ba" at the end of the sentence means guessing and questioning. Use a question mark, such as is he your friend?

Exclamation marks are mainly used at the end of exclamatory sentences to express strong feelings. The exclamation point at the end of a sentence can express strong feelings, such as surprise, sigh, joy, praise, anger, sadness and so on.

Exclamation marks mainly have the following six functions:

1, indicating the pause at the end of the exclamatory sentence.

2. Interjections are also used in imperative sentences with strong tone.

3. Exclamation marks are also used after rhetorical questions with strong tone.

4. Exclamation marks can be used for words with strong tone, non-subject-predicate sentences and exclamation marks with strong feelings.

5. After address forms, response forms and onomatopoeias, and at the end of slogans, if there is a strong feeling, also use exclamation marks.

6. If the exclamatory sentence is inverted, the exclamation point at the end of the sentence should also be placed at the end of the sentence.