let alone do vs let alone doing

Some examples from the web:

• I mean, I didn't even know Rex could change batteries, let alone do anything mechanical.
• You can't even talk about it, let alone do it.
• Keep cooking like that and I won't be able to move, let alone do science.
• The man can hardly fix himself a cup of tea, let alone do laundry.
• I can't think of any other example in medicine where we actively stop a healthy function of the body, let alone do so at such great risk to the patient.
• No one's even required to take it, let alone do well.
• LET ALONE DO IT WITH.
• It is a time to let music alone do the work of the ministry.
• When I was your age, I didn't know what I was doing, let alone how to do it with a baby.
• "Let alone love, you don't even deserve sympathy"
• Let alone what you do to him after you've got him.
• The common reaction when people know that they are supervised is to escape from it, let alone when they don't want others to know their doings online.
• Let's alone and do the murder first.
• Incredible instant shine and smoothness to the hair, it eliminates static electricity in the city, let alone how we could do without on vacation.
• It's hard enough when it's someone you don't know, let alone someone you do.
• Look if you want to help just leave me alone and let me do it my way - please.
• We have in our hands a Green Paper on 'Living and Working in the Information Society', whose letter let alone spirit do nothing to advocate the priority of the human factor and respect for the rights of working people.
• I wish to highlight that there are other problems within the fuel market, let alone the problems to do with tax.
• I wouldn't be a good scientist if I let you do it alone.
• That's how we can be alone, let's do it.

Some examples from the web:

• With that same logic, it is impossible for an average seeker doing regular spiritual practice, let alone a person not doing spiritual practice, to judge the difference in spiritual maturity between two Saints.
• Let this letter show that I take full responsibility for killing Bobby Marks and Ray Carroll, and I acted alone doing it.
• She really paved the way at a time when nobody was doing stunts, let alone women.
• When I was your age, I didn't know what I was doing, let alone how to do it with a baby.
• Some people, for instance, attempt complete stage practices when they are not willing or even interested in doing a long sadhana, let alone having mastered it.
• I barely know what I'm doing next week, let alone next summer.
• We were all walking on thin ice as it is without having to explain what Liam was doing at JT's, let alone what my father was.
• Doing it this way, it would be impossible for the exhaust gases to stream through in one, let alone both of them.
• The common reaction when people know that they are supervised is to escape from it, let alone when they don't want others to know their doings online.
• I mean, we're not used to doing anything for ourselves, let alone drive.
• If you never even notice, let alone discuss (argue about?) your different needs and wants you may not even realize the damage you're doing to your relationship.
• What would he be doing here, let alone in the country?
• Unfortunately, it's not a case of simply pointing your camera moon-ward and shooting; doing that might be tempting but the end photo won't be worth viewing let alone sharing with others.
• We cannot continue, let alone expand without financial support.
• I'm always out here alone doing this.
• I'm always out here alone doing this.
• You mean sitting home alone doing absolutely nothing?
• Let alone a first date, so...
• Jason barely knows what he's thinking, let alone anyone else.
• Let alone cook a steak properly.