Determine the ambiguity in the following sentences and their causes: 1. John and Jim are brothers I can't stand. 2. There are cooking apples. 3. I can't recommend him too highly.

1. The ambiguity in this sentence lies in the phrase "I can't stand." It is unclear whether the speaker is saying they can't stand John and Jim because they are brothers, or if they can't stand John and Jim for some other reason.

2. The ambiguity in this sentence is caused by the word "cooking." It is unclear whether the apples are specifically for cooking, or if they are apples that happen to be cooking (e.g. in an oven).

3. The ambiguity in this sentence is caused by the phrase "too highly." It is unclear whether the speaker is saying they cannot recommend him highly enough, or if they are saying they cannot recommend him at all.

1. John and Jim are brothers I can't stand.

- Ambiguity: The sentence could mean either that John and Jim are brothers, and the speaker can't stand them, or that John and Jim are brothers who cannot stand each other.
- Cause: The prepositional phrase "I can't stand" can modify either "John and Jim" or "brothers."

2. There are cooking apples.

- Ambiguity: The sentence could either mean that there are apples that are used for cooking, or that there are apples that are currently being cooked.
- Cause: The present progressive tense can indicate either an ongoing action or a state of being.

3. I can't recommend him too highly.

- Ambiguity: The sentence could mean either that the speaker cannot recommend the person highly enough, or that the speaker cannot recommend the person at all.
- Cause: The adverb "too" can intensify either a positive or a negative meaning.