Gerund vs Infinitive

What form follows a preposition: V-ing or to + base?

جرّب تحلّها أوّلًا ✍️

Gerund or infinitive? «I'm looking forward to ___ (see) you.»

جرّب تحلّها أوّلًا ✍️

Complete: «He promised ___ (help) and suggested ___ (start) early.»

جرّب تحلّها أوّلًا ✍️

Write three sentences about feelings using a verb + gerund, a verb + infinitive, and a preposition + gerund.

جرّب تحلّها أوّلًا ✍️