We use the bare infinitive after modal verbs CAN and SHOULD:
"You can jump.."
"She should drink more water during these hot days."
Try to say the following sentences as fast as you can.
1/ Which wristwatchers are Swiss wristwatches?
2/ I can think of six thin things, but I can think of six thick things too.
3/ She sells seashells on the seashore.
Pronunciation "th" should not sound like "da" or "fa".
Put your tongue between your teeth to make the "th" sound.
Look in the mirror - is your tongue just a little bit between your teeth?
Can you enumerate all planets in our Solar System?
All the planet names in English are capitalized, except "earth"!
"I am wishing for peace on earth."
Except when we are talking about it in an astronomical way:
"The rocket left the Earth and went to Mars."