1 He missed the bus.Therefore,he was late for calss this morning
=>Since
2 Let’s wear medical masks when going out in public places to prevent Coronavirus
=>We suggest medical masks
3 They speak English well
=>They are
4 Don’t hope to be successful with trying your best
=> If
1 Since he missed the bus, he was late for class this morning
2 We suggest wearing medical masks when going out in public places to prevent Coronavirus
3 They are good at speaking English
4 If you don’t try your best, you won’t be successful
1, Since he was late for calss this morning
2, We suggest medical masks should be worn when going out in public places to prevent Coronavirus
3, They are good English speakers.
4, If you try your best, you will be successful