couldst

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

他不能做这事，也不能，你也不能，任何人都不能。

I can throw the ball farther than you can.

这个球能比你扔得远。

I’ll help you insofar as I can.

力帮助你。

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

如果你把I can两词前后颠倒下, 就成了can I。

You can open the can by pulling the tab.

你可拉拉环把头打开。

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

你能原谅吗？能忘记你吗？们能继续走下去吗？

Food in cans is called canned food.

装在头里的食品叫头食品。

I have to economize where I can.

能节省的地方都得节省。

Be as quick as ever you can!

量快些!

Tie the knot as tight as you can.

量把这个结打紧。

You pack in as tightly as you can.

你们量往里挤。

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

|路易斯，找不到头开口处！

I've been earning a crust wherever I can.

四处谋生。

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

如果可能的话会将这些无赖痛打顿。

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

猫的爪子可以缩进去, 但狗不能。

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

你能不能推荐位能承担这项工作的同学?

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。

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将力而为。