Fill in the past tense by adding -ed to the given verbs.

The task is to convert the given verbs into their simple past tense forms by adding -ed to each verb. Here's how to solve it step by step:

Instructions:

1. Identify the verbs: The list of verbs provided are: jump, add, walk, open, talk, laugh, call, chew, comb, paint.
2. Apply the rule: For most regular verbs, the simple past tense is formed by adding -ed to the base form of the verb.
3. Write the answers: Fill in the blanks with the past tense forms.

Solution:

Here are the past tense forms for each verb:

1. Jump → Jumped
2. Add → Added
3. Walk → Walked
4. Open → Opened
5. Talk → Talked
6. Laugh → Laughed
7. Call → Called
8. Chew → Chewed
9. Comb → Combed
10. Paint → Painted

Final Answer:

```
jump → jumped
add → added
walk → walked
open → opened
talk → talked
laugh → laughed
call → called
chew → chewed
comb → combed
paint → painted
```

Explanation:

- Most verbs in English form their past tense by simply adding -ed to the base form.
- However, there are some irregular verbs that do not follow this pattern (e.g., "run" becomes "ran"), but all the verbs in this list are regular and follow the rule of adding -ed.

Thus, the completed worksheet would look like this:

| Verb | Past Tense |
|---------|------------|
| jump | jumped |
| add | added |
| walk | walked |
| open | opened |
| talk | talked |
| laugh | laughed |
| call | called |
| chew | chewed |
| comb | combed |
| paint | painted |

Final Answer Boxed:
\boxed{
\begin{array}{ll}
\text{jump} & \text{jumped} \\
\text{add} & \text{added} \\
\text{walk} & \text{walked} \\
\text{open} & \text{opened} \\
\text{talk} & \text{talked} \\
\text{laugh} & \text{laughed} \\
\text{call} & \text{called} \\
\text{chew} & \text{chewed} \\
\text{comb} & \text{combed} \\
\text{paint} & \text{painted} \\
\end{array}
}