Step 1: Understanding Sentence Combination.
To combine the sentences into a simple sentence, we can use a participle phrase or a conjunction to link the two ideas clearly and concisely.
Step 2: Combining Sentence (i).
The two sentences “He gave them advice” and “He helped them liberally” can be combined as:
He gave them advice and helped them liberally.
Final Answer:
\[
\boxed{\text{He gave them advice and helped them liberally.}}
\]