It tends to happen gradually over a period of time.

Crime tends to happen in hot spots so if you are not sure, ask someone.

This, of course, is what tended to happen in the total society.

Whether or not the Government facilitate that, it will tend to happen.

This is indeed what tends to happen in groups of real islands.

It tends to happen quickly in areas where people don't care.

As tends to happen in times of crisis, the first thing to go is language.

But bad things tend to happen at the worst possible time.

These things tend to happen when you ski with friends and family.

But, as tends to happen, the means became an end in itself.