jumped to /into

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He jumped into the sea to save the girl who was drowning.

He jumped into the sea to save the drowning girl.

Can I say,

He jumped into the sea to save the girl from drowning.

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Yes.
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I could be mistaken, but I don't see anything wrong with "he jumped in the sea to save the drowning girl." People regularly substitute "in" for "into" in everyday speech. Do you object to the form on grammatical grounds?

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I am teaching English for EFLs, Marvin. They often have to take language proficiency tests, which would see 'in' as an incorrect answer here.

Can I say,

(i) John jumped and saved the drowning girl.

(ii) John jumped into the river because the girl was drowning.

(iii) John jumped to save a girl when she was drowning.

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(i) John jumped and saved the drowning girl.-- Grammatical but semantically puzzling

(ii) John jumped into the river because the girl was drowning.-- OK.

(iii) John jumped to save a girl when she was drowning.-- Grammatical but semantically puzzling

Thanks. Can I say,

John jumped into the river when he saw a girl was drowning.

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Yes.
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John jumped into the river when he saw that a girl was drowning.

Will this be better?