Here are the corrections needed:

1. **We** was late for school yesterday.
- Corrected: **We were** late for school yesterday.

2. There **r ere** a concert at the stadium last night.
- Corrected: There **was** a concert at the stadium last night.

3. I **was at the museum two days last.**
- Corrected: I **was at the museum two days ago.**

4. **We walked** to the library to catch a train.
- Corrected: The sentence is correct.

5. They **runned** to school because they were late.
- Corrected: They **ran** to school because they were late.

6. We **goed** to the shopping centre yesterday.
- Corrected: We **went** to the shopping centre yesterday.

7. How **I get** to the hospital?
- Corrected: How **do I get** to the hospital?

8. **Straight go on.**
- Corrected: **Go straight on.**