We cannot let history repeat itself.

Such activity cannot be allowed to continue.

We cannot let that happen again.

In this new world, we can no longer safely tolerate the general threat that can come from a particular human tragedy, wherever it takes place.

We cannot allow the Bretton Woods institutions to remain forever impervious to our calls.

At this critical moment, we can t allow this to fade away.

We cannot let this continue.

We should not, however, allow this sentiment to turn into an all purpose rant against personal wealth.

We need not be overwhelmed by the dizzying array of problems plaguing migrants.

We cannot and certainly should not allow the inactivity of this important body to continue any longer.

That cannot be allowed to happen again.

We dare not let this happen.

And I wanted to tell her, and I want to tell you, we need to stop letting disease divorce us from our dreams.

Second, our rhetoric about our role as America s international partners for peace should not stray too far from reality.

We cannot allow key local groups to be sidelined or marginalized in post conflict regions.

How much more value would Washington Mutual s management have destroyed if the bank had been all equity financed?

That is why we do not allow patents for basic insights in mathematics.

That may be true, but it should not be permitted to obscure the underlying structural problem that the world economy is facing.

We cannot afford to let that happen.

So let s permit new generations to define their own battles and desires.

We won t let them

It would be a big mistake to let that happen.

We must not allow that to happen.

Africa s people must be allowed to gain confidence, dignity, and a sense of self worth.

A spiral of frustration and antagonism must not be allowed to develop.

Once we allow surgery, we allow multiply connected domains inside the same contour.

But we cannot allow the distortion of faith or long standing custom to be used as an excuse to ignore the rights of girls and women, and to hold their communities in poverty.

While Putin s policies could have been much worse it is legitimate to give him credit where it is due Russia should not be allowed to take the West for granted.

SS We found that the most important thing for permitting Bonobos to acquire language is not to teach them.

Conflict between advanced and developing countries over responsibility for mitigating carbon emissions should not be allowed to undermine prospects for a global agreement.

The effort to avoid the harm of flawed compensation decisions in the future should not be deterred by speculative arguments about unintended consequences.

In Syria, we know what is happening and that it is wrong to let it happen.

We cannot allow the reform effort to be derailed or to run out of steam.

Now do we really want to commit ourselves to engulfing all the other religions when their holy books are telling them, Don't listen to the other side, that's just Satan talking!

But those problems should not be allowed to obscure the continent s many success stories much less to be defined as Africa s alone.

We will not tolerate this move to revive militarism.

We will not allow anyone to obstruct the Israeli withdrawal.

Provides cannot be broken

You cannot be serious.

You can't be serious.

Ostriches can't fly.

My mother can't come.

Stones don't swim.

It cannot last long.

It can't be!