Q/do as required 1- She keeps her friend's secret. (negate)
2- I swear it was torn. (past)
3- The fish swim upstream (past)
4- He spent 2 dollars on it. (present)
5- He tore his pants (present)

1.  She does not keep her friend's secret.

2. I swore it was torn.

3. The fish swam upstream.

4. He spends 2 dollars on it.

5. He tears his pants.

Explanation:

1. She keeps her friend's secret. (negate)

This requires that the sentence be negated.

To negate means to say the opposite. This is as simple as writing a negation word for the main verb in the sentence. Negation words are no, not, never e.t.c

The main verb in the sentence is keeps.

Negation of keeps gives does not keep.

Therefore, the sentence can be negated as follows;

She does not keep her friend's secret.

2. I swear it was torn. (past)

This requires that the sentence be written in its past form.

This simply means that the main verb of the sentence is changed from its present form to past form.

The main verb in the sentence is swear.

The past tense of swear is swore.

Therefore, the sentence can be converted to past form as follows;

I swore it was torn.

3. The fish swim upstream. (past)

This requires that the sentence be written in its past form.

This simply means that the main verb of the sentence is changed from its present form to past form.

The main verb in the sentence is swim.

The past tense of swim is swam.

Therefore, the sentence can be converted to past form as follows;

The fish swam upstream.

4. He spent 2 dollars on it. (present)

This requires that the sentence be written in its present form.

This simply means that the main verb of the sentence is changed from its past form to present form.

The main verb in the sentence is spent.

The present tense of spent is spends.

Therefore, the sentence can be converted to present form as follows;

He spends 2 dollars on it.

5. He tore his pants. (present)

This requires that the sentence be written in its present form.

This simply means that the main verb of the sentence is changed from its past form to present form.

The main verb in the sentence is tore.

The present tense of tore is tears.

Therefore, the sentence can be converted to present form as follows;

He tears his pants.

d. because santiago thought any sharks would assume the marlin was part of the boat

i think one answer could be this poet uses no rhyme.