Ionnsaich← Home
sgrìobhwriteverb
past
sgrìobh
future
sgrìobhaidh
-ing
a' sgrìobhadh

sg resists lenition, so the past looks like the root.

Every form but the headword, the genitive and the plural is worked out by the spelling rules in the grammar guide, so what you see here is what the guide teaches. Awaiting a fluent speaker’s review.