Learn English – answering the phone vs taking the call

To dream of something implies a want, a need, a desire:

I dream of traveling the world

I dream of world peace

I dream of Jeannie

To dream about something is to literally dream about something, and it's usually presented in the past tense:

I dreamt about winning the lottery

I dreamt about flying

I dreamt about being a millionaire

To use it in the present tense is more common.

I dream about becoming rich

I dream about Jeannie

I dream about wonderful things.

To dream of uses a different past tense form as well.

DREAMED

I dreamed of having the perfect house

I dreamed of winning the lottery

I dreamed of paradise on the beach.

These have nothing to do with dreaming while asleep. They are all imagined, hoped for, dreamed of...

Formally, we use accuse with an act—we assert that somebody did something reprehensible:

Mary accuses John of failing to lock the door.

But we use blame with the outcome—we assert somebody's responsibility for the undesirable result:

Mary blames John for the robbery. OR
Mary blames the robbery on John.

Informally, however, these distinctions often blur. For instance, if the robbery has already been mentioned, blame may very easily take a for clause which explains why the target is blamed:

Mary's house has been robbed. Mary blames John, for failing [=because he failed] to lock the door.

And accuse may take a complement which expresses a state rather than an act:

Mary accuses John of being responsible for the robbery.