How, when, and where the sexual phase in their life history occurs remains unknown.

I was anxious for you to be here when a rather important phase of our local history occurred.

The final phase of development occurred in the 1980's.

A fourth possible phase - marriage - doesn't occur to him.

One example of this being students asked to explain why the moon's phases occurred in the order that they did.

The final phase of development occurred in the 1980s.

In both cases, only the first three phases occur.

The oral phase occurs in about the first year of a child's life.

No phase of his life had occurred by his own free choice.

The first phase of the civil war occurred in 1942-1944.