Book 6B
for +ing/ n.

Book 6B Ch.6
Use of suffixes

Book 6B Ch.5
Use of 'always' and 'never'

Book 6B Ch.4
Therefore/ unless

Book 6B Ch.3
'So many' and 'so much'

Book 6B Ch.3
Use of stop +ing

Book 6B Ch.2
Use of sequence words

Book 6B Ch.1
as+adj.+as