couldst

He can't do it, nor can I, nor can you, nor can anybody.

他不能，我也不能，你也不能，任何人都不能。

If you invert “I can”, you have “can I”.

如果你把I can两词前后颠倒一下, 就成了can I。

I can throw the ball farther than you can.

个球我能比你扔得远。

I’ll help you insofar as I can.

我一定尽力帮助你。

You can open the can by pulling the tab.

你可拉拉环把罐头打开。

Can you forgive me ? Can I forget you ? Can we forgather with us?

你能原谅我吗？我能忘记你吗？我们能继续走下去吗？

Food in cans is called canned food.

装在罐头里的食品罐头食品。

I have to economize where I can.

能节省的地方我都得节省。

Be as quick as ever you can!

尽量快些!

Tie the knot as tight as you can.

尽量把个结打紧。

You pack in as tightly as you can.

你们尽量往里挤。

Lewis, I can't find the motherfucking can opener!

|路易斯，我找不到罐头开口处！

I'll give the scoundrels a drubbing if I can!.

如果可能的话我会将些无赖痛打一顿。

Can you recommend a classmate who can take up the job?

你能不能推荐一位能承担项工作的同学?

A cat can retract its claws, but a dog can’t.

猫的爪子可去, 但狗不能。

One minute can be prefect moment, also can be regretable ternity.

一分钟可成绝美的时刻，也可成永世的遗憾。

If the virus cannot replicate itself, it cannot cause illness.

如果病毒不能变异，也就不能够诱发疾病了。

Celiac pressing increases can cause heartbeat change. Can take metacentre grain therapy.

腹压增多能够引发心率改动.能够使用稳心细粒医治.

Tourists can CROSSLINE hiking, nature viewing scenery, can also rowing boats, fishing pastime.

旅游者既可爬山越岭、观赏大自然风景，也可划船游艇、钓鱼消遣。

I shall do what I can insofar as I am able.

在力所能及的情况下我将尽力而为。