The following table specifies, for each kind of construct that can be logically or non-logically connected in Lojban, what kind of connective is required for both afterthought and (when possible) forethought modes. An asterisk (*) indicates that tensed connection is permitted.

A line of dashes indicates that connection of the specified type is not possible.

   construct   afterth. foreth.  afterth.  foreth.
                    logical  logical  non-log.  non-log.
    ---------   -------  -------  --------  --------

    bridi       ijek*    gek     ijoik*     joigik
    sumti       ek*      gek     joik*      joigik
    bridi-tails gihek*   gek     ---        joigik
    termsets    ek*      gek     joik*      joigik
    tanru parts jek      guhek   joik*      ---
    operands    ek*      gek     joik*      joigik
    operators   jek      guhek   joik       ---
    tenses/modals   jek      ---     joik       ---
    abstractors jek      ---     joik       ---