What goes after 'let alone'?

[Duc]

Hello everyone,
Please look at the two sentences below:
1. Keeper Judge never touched him let alone trip him.

2. Many thousands of children had never even seen, let alone owned a pair of shoes.
I wonder why it is ‘trip’ in the first sentence but ‘owned’ in the second one, maybe in the second one, there is a ‘had’ before ‘seen’ and ‘owned’ (owned is past participle).But why in the first sentence, ‘trip’ is in infinitive form while ‘touched’ is a verb ?
Please explain it for me. Thank you very much !
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Don't see your shade think you are great

[Mister Micawber]

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'Trip' is wrong in the first sentence; it should read 'tripped'.
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Native English teacher at Mister Micawber's

[Yankee]

Hi Duc

I think 'trip' might work in your first sentence with this wording:

1a. Keeper Judge didn't touch him let alone trip him.

Maybe MM will chime in with his opinion on this.
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"Nearly all men can stand adversity, but if you want to test a man's character, give him power." ~ Abraham Lincoln

[Mister Micawber]

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Yes, of course-- the tenses must be the same.
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Native English teacher at Mister Micawber's