1.忘记[+to-v][+v-ing][+(that)][+wh-] I forgot posting the letter.
我忘了信已寄出。
Don't forget to post the letter.
别忘了去寄信。
Sorry, I've forgotten your name.
对不起,我忘了你的名字。
I forgot my keys.
我忘了带钥匙了。
Let's forget our disagreements.
我们不要再提我们之间的争吵了。
Don't forget the waiter.
不要忘了给侍者小费。
If we can't get any financial backing, we might as well forget the whole thing.
如果得不到经济上的支持,我们还是放弃整个计划好。
I forgot about the food cooking on the stove.
我忘记炉子上做的饭了。