Explain + (that)
“There aren’t any problems anymore”
The mechanic explained (that) there weren’t any problems anymore.
Insist + on+ -ing / insist+ (that)
“ I want to finish this first”
I insisted on finishing that first.
I insisted (that) I finished that first.
Promise + (that) / promise+ to + infinitive
“I will pick you up”
Dad promised (that) he would pick me up.
Dad promised to pick me up.