彼が黒板に書くことはすべてノートに写した。

Meaning
everything he wrote on the blackboard was copied into a notebook

Vocab used in this sentence

he, his, him, boyfriend
is, there, but, ga, will, however
黒板
blackboard, chalkboard, whiteboards
in, to, on, at, into, upon
書く
write, compose
こと
that, thing, about, fact, matter
a, the, is, am, are, will
すべて
all, every, everything, entirely, completely
ノート
note, notebook, laptop, notes, pad, memo
in, to, on, at, into, upon
写し
copy, duplicate, transcript, facsimile, duplicates, photocopies
the, was, ta, da, other

The award winning developer Jeffrey van Binsbergen, known for his high valued optimalisations and AI skills.