chīwán wǎnfàn yǐhòu, tā chángcháng bāng māma xǐ wǎn, ràng māma hěn gāoxìng.

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Breakdown of chīwán wǎnfàn yǐhòu, tā chángcháng bāng māma xǐ wǎn, ràng māma hěn gāoxìng.

• 她tā: she
• 高兴gāoxìng: happy
• 妈妈māma: mom

Questions & Answers about chīwán wǎnfàn yǐhòu, tā chángcháng bāng māma xǐ wǎn, ràng māma hěn gāoxìng.

Why is 完 after 吃 in 吃完晚饭? Can I say 完吃晚饭 or just 吃晚饭?

In Chinese, 完 (wán) is a result complement. The normal order is:

Verb + 完 + Object

So:

• 吃完晚饭 = to finish eating dinner
• 吃晚饭 = to eat dinner (no idea of “finished”)

You cannot say 完吃晚饭; result complements come after the verb, not before.

Also, note that 完 already shows the action is completed, so in many contexts you don't need 了 right after it. 吃完晚饭以后 already clearly means “after (she has) finished eating dinner”.

What does 以后 add in 吃完晚饭以后? Could I leave it out?

以后 (yǐhòu) literally means “after” / “afterwards”.

• 吃完晚饭以后 = after finishing dinner
  If you drop 以后, you get 吃完晚饭, which can still mean “after finishing dinner” in context, but it’s less explicitly marked as a time clause.

With 以后, the structure is very clear: > [Time clause]， [main clause]
> 吃完晚饭以后， 她常常帮妈妈洗碗。
> After finishing dinner, she often helps her mom wash the dishes.

You could omit 以后 in casual speech, but for learners it’s good to keep it because it marks the “after…” relationship very clearly.

Why is the time phrase at the beginning: 吃完晚饭以后，她常常…? Can I say 她吃完晚饭以后常常帮妈妈洗碗 instead?