ce and bce or bc and bce
It is widely accepted that the final period after the abbreviation does double duty in ending the sentence and the abbreviation at the same time.
bc and bce
Since you didn't include the abbreviations in the question we cannot answer
The abbreviation for forenoon is "AM" or "A.M." which stands for ante meridiem and refers to the period of time before noon.
Since you didn't include the abbreviations in the question we cannot answer
A simple verb tense can allow you to describe any number of non-continuous events occurring in the same time frame. The simple tenses are past, present, and future, allowing you describe events in any time period.
People of the same time period are referred to as contemporaries.
Could be Specified Period of Time Contract or Southern Pacific Transportation Company.
Reconstruction
Yes, you can get your period and breastfeed at the same time!
I am not sure if bbm and cima can be done at same time period in UK.
Weather-over-a-period-of-time.