couldst

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

他不能做这事，我也不能，也不能，任何人都不能。

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

如果I can词前后颠倒下, 就成了can I。

I can throw the ball farther than you can.

这个球我能比扔得远。

I’ll help you insofar as I can.

我定尽力帮助。

You can open the can by pulling the tab.

可拉拉环罐头打开。

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

能原谅我吗？我能忘记吗？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.

尽量这个结打紧。

You pack in as tightly as you can.

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这些无赖痛打顿。

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

能不能位能承担这项工作的同学?

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

猫的爪子可以缩进去, 但狗不能。

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

分钟可以成绝美的时刻，也可以成永世的遗憾。

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，也可以划船游艇、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。