couldst

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

他不做这事，我也不，也不，任何人都不。

I can throw the ball farther than you can.

这个球我比扔得远。

I’ll help you insofar as I can.

我一定力帮助。

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

如果把I can两词前后颠倒一下, 就成了can I。

You can open the can by pulling the tab.

可拉拉环把头打开。

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

谅我吗？我忘记吗？我们继续走下去吗？

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.

节的地方我都得节。

Be as quick as ever you can!

快些!

Tie the knot as tight as you can.

把这个结打紧。

You pack in as tightly as you can.

们往里挤。

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

|路易斯，我找不到头开口处！

I've been earning a crust wherever I can.

我一直四处谋生。

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

如果可的话我会将这些无赖痛打一顿。

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

猫的爪子可以缩进去, 但狗不。

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

不推荐一位承担这项工作的同学?

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

一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.

如果病毒不变异，也就不够诱发疾病了。

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.

在力所及的情况下我将力而为。