Overlap:
- the copula may be absent with noun phrases and with locative phrases;
- de appears with noun phrases and with locative phrases;
- da appears with noun phrases but not with locative phrases.
Here we ignore the use of dya as locative copula in Nepveu (1770) and Weygandt (1798) (see Feature 75 "Predicative locative phrases").
Source: van Dyk ca. 1765: 43
Source: Schumann 1783: 26
Source: van Dyk ca. 1765: 89
Source: Schumann 1783: 117
Source: Schumann 1783: 127