just a moment是什么时态的标志

　　She was here just a moment ago.

　　她方才还在这儿。

　　Where's he gone? he was here just a moment ago.

　　他刚才还在这儿，怎么转脸就不见了？

　　I just saw him a moment ago.

　　我刚才还见到过他。

　　Just a second/ moment, the reporter will come to interview you.

　　稍等片刻，那名记者马上会过来采访你。

　　I just zoned out for a moment.

　　我刚睡着了一会儿。