いやしくもそれをする以上はの英語

On no account must you do such a thing.

I didn't mean it.

On no account must you do such a thing.

If you do such a thing, you shall be deservedly dealt with―have your deserts―hear of it―repent it.

You shall smart for it.

None but a fool would do such a thing.

a fine example; a model to be followed

to cause someone to toy with something

I must have my say.

the degree to which something is exaggerated

You shall smart for it.

You are acting against your interests.

None of that!

I can not overlook such conduct.

You can not do it （in） that way.

I don't think this will get us anywhere.

an act of being behind (of other things)

You must do that before you can be this

We need not do such a thing.

You cannot do it with safety.

It is the height of folly to attempt such a thing.

I can not pass over the matter in silence

to unravel and mend a tangled object

Do not do it again

an extreme degree of being idle

It is needless to do that

Not that he can not, but that he does not.

Has care such power to ravage a once-beautiful face?

That will not mend or mar matters.

the act of stepping over something